c: 12 january 2012

C: 12 January 2012

Grab your green folder Objective: You will be able to:

write correct formula equations for chemical reactions

Do now: Brainstorm: Write down as many indications (signs) of a chemical reaction as you can.

Agenda

I. Do nowII. Organize/stampIII. Chemical reactions notes and demoIV. Writing equations examplesV. Practice problemsHomework: Week 18 Homework #1-3, 7-

9: Fri.Late work/Lab report rewrites by

Weds. Jan. 18

10 min. to organize

1. Organize your folder/notebook.2. Stack up and paperclip all Unit 3

materialsPut your tracking sheet on top.

3. Track your last Unit 3 Quiz.4. Get stamps!5. Put your papers in your green folder in

the bin.**You must be in your seat unless you

are putting your folder in the bin.**

Chemical Reactions

Demo

In your notebook, record your observations.

Indications of a Chemical Reaction

1. Heat and Light2. Production of a Gas (bubbles)3. Formation of a precipitate

A solid produced as a result of a reaction between two solutions

4. Color change

chemical reaction: changing substances to other substances by breaking bonds in reactants and forming new bonds in products.

http://www.youtube.com/watch?v=F54rqDh2mWA



Chemical Equations

How do chemists describe chemical reactions?

chemical equations: an expression representing a chemical reaction

Word Equation

Hydrogen gas combines (explosively!) with oxygen gas to produce water vapor reactants: hydrogen, oxygen products: water

Formula Equations

H2(g) + O2(g) H2O(g)

(s) – solid, (l) – liquid, (g) – gas (aq) – aqueous (dissolved in water)

Reactants

Products

Symbols

+ and, reacts with yields (to yield), produces (to

produce), forms (to form)

Diatomic molecules

7 elements make diatomic molecules:

H2, N2, O2, F2, Cl2, Br2, I2

“7 make a 7” HINClBrOF

You must be sure to write correct chemical formulas for reactants and products!

Write the word equation

Na2O(s) + H2O(l) NaOH(aq) Solid sodium oxide reacts with water

to yield a solution of sodium hydroxide

Write the formula equation

Solid copper reacts with a solution of silver nitrate to yield solid silver and a solution of copper (II) nitrate.

Cu(s) +AgNO3(aq) Ag(s) + Cu(NO3)2(aq)

C: 13 January 2012

Take Out Homework: Week 18 #1-3, 7-9

Objective: You will be able to: write correct formula equations for

chemical reactions Do now: Write the word equation:Zn(s) + HCl(aq) ZnCl2(aq) + H2(g)

Agenda

I. Do nowII. Writing equations practice problemsIII. Exit ticketHomework: Week 18 Homework #4-6

and 10-18: WednesdayLate work/Lab report rewrites by

Weds. Jan. 18

Practice

1. Solid magnesium reacts with oxygen gas to yield solid magnesium oxide.

Practice Worksheet

Complete pages 3-4 with your partner

Exit ticket

Homework

Week 18 Homework #4-6 and 10-18: Wednesday

Late work/Lab report rewrites by Weds. Jan. 18

A: 12 January 2012

Take Out Homework: Week 18 # 1-3, 7-9

Objective: You will be able to: write formula equations for

chemical reactions Do now: Write correct formulas for:

a. iron (III) oxide

b. nitrogen dioxide

Agenda

I. Do nowII. Check homework and answersIII. Writing formula equations practiceHomework: Week 18 Homework #4-

6 and 10-12Late work/Lab report rewrites by

Weds. Jan. 18

Writing Formula Equations

Complete pages 1-2 with your partner.

C: 18 January 2012

Take Out Homework: Week 18 #4-6, 10-12

Objective: You will be able to: use the law of conservation of

mass to balance chemical equations

Do now: Write the formula equation for:

Solid magnesium reacts with oxygen gas to yield solid magnesium oxide.

Agenda

I. Do nowII. Paperclip Mini-labIII. Balancing Equations ExamplesIV. Practice ProblemsHomework: Finish paperclip mini-

lab: Thurs.Week 18 Homework pages 5-6: Thurs.

Midterm Exam

Wednesday, January 25 10:15 am -12:05 pm Bring a calculator, pens/pencils You’ll get a periodic table and

polyatomic ions list

Midterm Exam

29 Questions, most with 2 parts A mix of multiple choice and short

answer/problem solving Some have tier III questions – at end of

test On most objectives in Units 1-5

Your review sheet will tell you which ones.

Very similar to quiz and homework questions you’ve seen.

Paperclip Mini Lab p. 1-2

You and your partner share on bag of paperclips.

Follow the directions exactly. Be sure to record data as specified by

the directions. To bond, unlink paperclips completely

from the original compounds and then relink them to form the new compound.

Unlink all paperclips and return to bag when you finish!

Law of Conservation of Mass

In a chemical reaction, matter is never created or destroyed.

The number of atoms and the mass of each element of the reactants must be equal to the number of atoms and the mass of element of the products.

This is shown by placing a coefficient in front of the formula for each compound.

HHHHHHHHHHHH

OOOOOOOOOOOO

CCCCCCCCCCCC

H

HH

HH

HH

HH

HH

H

O O

O O

O O

O O

O O

OO

H H

H H

H

H

H

H

HH

HH

OO

OO

OO

OO

OO

OO

CCCCCCCCC

C

C

C

H2(g) + F2(g) HF(g)

H2(g) + F2(g) HF(g)2

H2O(l) H2(g) + O2(g)

H2O(l) H2(g) + O2(g)2 2

Balancing Chemical Equations

Ca(s) + S8(s) CaS(s)

Ca(s) + S8(s) CaS(s)8 8

Zn(s) + HCl(aq) ZnCl2(aq) + H2(g)

Zn(s) + HCl(aq) ZnCl2(aq) + H2(g)2

Balancing Equations

1. H2 + O2 H2O

2. ZnS + O2 ZnO + SO2

3. Ag3PO4 + KBr K3PO4 + AgBr

4. H2SO3 + O2 H2SO4

5. Na2SO4 + Fe(NO3)3 NaNO3 + Fe2(SO4)3

6. AgNO3 + CaCl2 AgCl + Ca(NO3)2

Now:

Finish the paperclip lab page 3 Rank your studying priorities on

pages 1-3 of the midterm review guide Both of these things are due

tomorrow!

Assignment

Paperclip Mini-lab Handout with your partner

Homework

Finish paperclip mini-lab Week 18 Homework pages 5-6

both due tomorrow

C: 19 January 2012

Take Out Homework: Paperclip Mini-Lab and Midterm Review Packet

Objective: You will be able to: balance chemical equations to satisfy the

law of conservation of mass and review for the midterm

Do now: Write and balance: Solutions of silver nitrate and calcium

chloride react to form solid silver chloride and a solution of calcium nitrate.

Agenda

I. Do nowII. Homework answersIII. Writing and balancing equations

practice challenge!IV. Unit 1 ReviewV. Midterm review packet work timeHomework: Finish Unit 1 Review

questions AND Priority 1 and 2 Questions: Fri.

On your Priorities Ticket

Write down your top three priority units.

We’ll use these to make work groups tomorrow and Monday.

Midterm Exam



Unlock the Code!

1. With your partner, write and balance four equations.

2. Place the correct coefficients into the blanks at the top of the page.

3. Come up and try the lock!4. Hand in your worksheet.5. Start Unit 1 Review problems with

your partner.

Unit 1 Review

1. With your partner, complete the Unit 1 Review questions (p. 3-7)

2. When you finish, decide on your next priority and begin those questions.

1. You will receive a class work grade out of 10 points for your work today.

2. Stay in your seat, work quietly, stay on task

Homework: Unit 1 Questions and your Priority 1 and 2 Questions due tomorrow.

A: 19 January 2012

Take Out Homework: Week 19 Homework

Objective: You will be able to: review Unit 1 for the midterm

exam. Do now: List the steps of the

scientific method. Then, write a hypothesis for the

research question: Will my jeans shrink more each time I put them in the dryer?

Unit 1 Review

Unit 1 is a HUGE priority for this class!

So, let’s review together.

Na2O2 + H2O NaOH + O2

2Na2O2 + 2H2O 4NaOH + O2

CaCl2 + Fe2(SO4)3 CaSO4 +

FeCl3

3CaCl2 + Fe2(SO4)3 3CaSO4 +

2FeCl3

Al2O3 + HCl AlCl3 + H2O

Al2O3 + 6HCl 2AlCl3 + 3H2O

KClO3 KCl + KClO4

4KClO3 KCl + 3KClO4

AgNO3 + CaCl2 AgCl + Ca(NO3)2

2AgNO3 + CaCl2 2AgCl + Ca(NO3)2

Na2SO4 + Fe(NO3)3 NaNO3 + Fe2(SO4)3

3Na2SO4 + 2Fe(NO3)3 6NaNO3 + Fe2(SO4)3

C12H22O11 + O2 CO2 + H2O

C12H22O11 + 12O2 12CO2 + 11H2O

BaCl2 + (NH4)2CO3 BaCO3 + NH4Cl

BaCl2 + (NH4)2CO3 BaCO3 + 2NH4Cl

Liquid silicon tetrachloride reacts with liquid water to produce solid silicon dioxide and a solution of hydrochloric acid.

SiCl4(l) + 2H2O(l) SiO2(s) + 4HCl(aq)

Nitrogen gas reacts with oxygen gas and water to produce a solution of hydrogen nitrate.

2N2(g) + 5O2(g) 2H2O(l) 4HNO3(aq)

KOH + Cl2 KCl + KClO3 + H2O

6KOH + 3Cl2 5KCl + KClO3 + 3H2O

Balancing Equations Practice Worksheet

A: 18 January 2012

Grab your clicker! Take Out Homework: Week 18 p. 5-7 Objective: SWBAT classify reactions as

one of the five types of chemical reactions.

Do now: Balance:Na2SO4 + Fe(NO3)3 NaNO3 +

Fe2(SO4)3

Agenda

I. Do nowII. Homework solutions balancing equationsIII. Balancing Equations Exit TicketIV. Types of Reactions NotesV. Clicker Practice ProblemsVI. Midterm Studying SurveyHomework: Week 19 Homework: Thurs.Finish “Unlock the Code” Worksheet

(optional)

Midterm Exam



Exit Ticket

Balancing Reactions

Midterm Review!

What units are your studying priority?

Complete by the end of the period You’ll be assigned groups working

on your top priorities based on this survey!

Then, work on your 1st priority review or the Week 19 Homework

Homework

Week 19 Homework: tomorrow “Unlock the Code” worksheet

(optional) Start the Midterm Review packet

(optional)

A: 19 January 2012

Take Out Week 19 Homework Objective: You will be able to:

review Unit 1 for the midterm! Do now: Fill in a Venn diagram: phosphide phosphate

Take Out Week 19 Homework Objective: You will be able to:

review Unit 1 for the midterm! Do now: Fill in a Venn diagram: phosphide phosphate

Agenda

I. Do nowII. Homework AnswersIII. Unit 1 Review with a partnerIV. Begin your second priority unit reviewHomework: Finish Unit 1 Review questionsFinish your priority #2 review questionsUnlock the code = extra credit: tomorrow

Extra Help

Today: 3:30-4:30 Monday and Tuesday at lunch Tuesday: 3:30-4:30

Your grade

10 point class work grade: follow directions stay on task work quietly with only your

partner stay in seat unless using a

scavenger hunt clue

A: 20 January 2012

Take Out: Midterm Review Packet Objective: You will be able to:

review your second and third priority units for the midterm!

Do now: a. How many atoms are in a mole of calcium?

b. How many atoms are in 0.50 moles of calcium atoms?

AgendaI. Do nowII. Today’s assignment and GroupsIII. Check Unit 1 answers with groupIV. Check assigned unit answers with groupV. Unit 4 Review as a classVI. Begin 3rd priority review questions

independentlyHomework: Complete your third priority

review questions (started in class) Then, complete the questions for one more

unit. You should have FOUR units complete! due Monday

Your #2 Priority: Check answers

Unit 2a: Garlyn, Joey, Sophie,

Unit 2b: Larissa, Emily, Zuri

Unit 2c: Ricardo, Israel

Unit 2d: Trae, Marie, Julian

Unit 3: Loveng, Brunyr, Crystal

Unit 4: Karen, Hannah

Homework

Complete your third priority review questions (started in class)

Then, complete the questions for one more unit. You should have FOUR units

complete! due Monday

C: 20 January 2012 Take Out: Review Packet Objective: You will be able to:

review your 2nd and 3rd priority units for the midterm.

Do now: Fill in Venn diagram: phosphide phosphate

Agenda

I. Do nowII. Groups and AssignmentIII. Check Unit 1 AnswersIV. Check Assigned Unit AnswersV. Complete 3rd priority review questionsHomework: Finish 3rd priority review

questionsDo one more unit: Due Monday.

Groups

Unit 2a: Javier, Dyani, Lorreno

Unit 2b: Jackson, Nekeyla, Bryan

Unit 2c: Meryem, Martely, Carlheb

Unit 2d: Leslie, Patrick, Christine

Unit 3a: Devin, Jesse, Kenny

Unit 3b: Courtney, Obayanna, Daysia

Unit 5: Adley, Kendra, Carla

Today’s assignment

1. With your group, check your answers to the Unit 1 Review Questions (10 min.)

2. Then, with your group, check your answers to review questions for your assigned unit (10 min.)

3. Finally, work independently to complete the review questions for your third priority unit. (remaining time)

Class work grade

10 points possible: Stay in your seat unless you’re

scavenging. Talk quietly and only with

members of your group. Stay on task and complete the

work!

Homework

Finish 3rd priority review questions Do one more unit: Due Monday.

You will have FOUR units done by Monday!

Extra Help

Today: 3:30-4:30 Monday and Tuesday at lunch Tuesday: 3:30-4:30

A: 23 January 2012

Take Out: Midterm Review Packet Objective: You will be able to

review objectives for the midterm exam.

Do now: Write an equation:A solution of sodium nitrate and solid lead (II) oxide react to form a solution of lead (II) nitrate and solid sodium oxide.

Agenda

I. Do nowII. Questions?III. Review work timeHomework: Check your review

answers!Study for midterm on WednesdayBring a calculator!Extra help Tuesday, 3:15-3:45 pm

Review Packet Answers

on the blog! I made a mistake on the second

balancing the equation problem – fix it for bonus points. Give me your correction tomorrow at the exam.

A review problem together!

A solution of sodium nitrate and solid lead (II) oxide react to form a solution of lead (II) nitrate and solid sodium oxide.

1. Write and balance the equation.2. Calculate the molar mass of lead (II)

nitrate.3. How many moles are equal to 10.0

grams of lead (II) nitrate?4. How many molecules is that?

On your own

Complete the review questions for any unit you have left.

You may quietly ask your partner if you have questions, but are working on your own.

Raise your hand if you have questions!

Questions?

C: 31 January 2012

Take Out: Green folder, notebook, two-pocket folder

Objective: You will be able to: look through your midterm, ask

questions and correct answers Do now: Fill in the blanks; I thought

the midterm was __________ because _________.

Agenda

I. Do nowII. Pass back workIII. Organize folders and materialsIV. Return midtermV. Ask and answer questions about

the midtermHomework: Be sure you have:

chemistry notebook, two pocket folder

Organize – 10 min.

You should have no loose papers in your notebook.

In your two pocket folder: “Homework:” Week 17 thru 19 “Everything Else:”

Unit 4/5 Objective Mastery Tracking Sheet (on top)

4.1/4.2 QuizWriting Formula EquationsChemical Reactions Mini-Lab

Paperclip everything else and put it in your green folder. Return your green folder.

Hand Back Exams

Your percent grade is circled on the top of the paper Tracking Sheet

Number circled by each objective is your objective mastery (0-4) for that objective.

3 = 95% unless there was no Tier III question, then 3 = 100%

MCAS = that multiple choice question was from an old MCAS question. Circled = you got it right.

Your extra credit is added into your percent already

Questions?

Homework

Notebook with no loose papers Cleaned out 2 pocket folder

I’m checking these Wednesday for 5 homework points!

C: 1 February 2012

Take Out: Folder and Notebook Objective: You will be able to:

identify reactions as one of the five types of reactions

predict the products of a single replacement reaction

Do now: Watch the demonstration. List two signs of a chemical reaction.

Agenda

I. Do nowII. Five types of reactions notes with demos!III. Practice ProblemsIV. Predicting products of a single

replacement reactionV. Practice problemsVI. S’mores pre-lab questionsHomework: Week 21 Homework Part 0Week 21 Homework page 1read S’mores lab

Types of Chemical ReactionsReaction Type General

EquationDefinition

Example

Composition

Decomposition

Single Replacement

Double Replacement

Combustion

A: 1 February 2012

Take Out: Open your folder on your desk Objective: You will be able to:

identify reaction demos as one of the five types of reactions

predict the products of a single replacement reaction

Do now: What type of reaction?a. AX + B → A + BXb. CaCO3(s) → CaCO(s) + CO2(g)

Agenda

I. Do nowII. Review five types of reactions with

demos!III. Predicting products of a single

replacement reactionIV. Practice problemsV. S’mores pre-lab questionsHomework: Week 21 Homework page 1,

read S’mores lab

Composition Reaction

• General Equation: A + X AX

• Definition: two or more substances combine to form a new compound.

• Example: Mg(s) + O2(g) → MgO(s)

Composition

Li + O2

O

Li2O

Li O

Composition Example

Solid magnesium reacts with oxygen gas to produce solid magnesium oxide.

Decomposition Reaction

• General Equation: AX A + X

• Definition: a single compound breaks down into two or more simpler substances.

• Example: 2H2O2(l) 2H2O(g) + O2(g)

Decomposition

KClO3 KCl + O2

K

ClO

OO

K

Cl

OO

Decomposition Example

Liquid hydrogen peroxide decomposes to form liquid water and oxygen gas.

Single Replacement Reaction

General Equation: A + BX AX + B

Definition: One element replaces a similar element in a compound.

Examples: Mg + 2HCl H2 + MgCl2

2Al + Pb(NO3)2 3Pb + 2Al(NO3)3

Single Replacement

KI + Br2 KBr + I2

BrK

BrI

Single Replacement Example

Magnesium metal reacts with a solution of hydrochloric acid to produce a solution of magnesium chloride and hydrogen gas.

Double Replacement Reaction

General Equation: AX + BY AY + BX

Definition: the ions of two compounds exchange places in an aqueous solution to form two new compounds.

Example: 2KI(aq) + Pb(NO3)2(aq) PbI2(s) + 2KNO3(aq)

Double Replacement

CuCl2 + Na2S 2NaCl + CuS

Cl Cl

Cu

Na Na

S

Double Replacement Example

Solutions of lead (II) nitrate and potassium iodide react to produce a solution of potassium nitrate and solid lead (II) iodide.

Combustion Reaction

General Equation: CxHy(g) + O2(g) CO2(g) + H2O(g)

Definition: a substance combines with oxygen and releases a large amount of heat (exothermic) or light energy

Example: C2H6(g) +O2(g) CO2(g) + H2O(g)

Combustion Example

Hydrogen gas reacts with oxygen gas to make water vapor.*

*Yes, this is also a combination reaction

A + Y AY

1 2 3 4 5

100%

0% 0%0%0%

1. Composition Reaction2. Decomposition Reaction3. Single Replacement

Reaction4. Double Replacement

Reaction5. Combustion Reaction

A + BX B + AX

1 2 3 4 5

0% 0% 0%6%

94%




AB A + B

1 2 3 4 5

5%

95%

0%0%0%




AB + XY AY + XB

1 2 3 4 5

0% 0% 0%

94%

6%




A + O2 CO2 + H2O

1 2 3 4 5

6%0%

89%

0%6%




2H2O 2H2 + O2

1 2 3 4 5

0%

94%

0%6%

0%




2C + O2 2CO

1 2 3 4 5

94%

0% 0%0%6%




Mg + CdCl2 Cd + MgCl2

1 2 3 4 5

0% 0%6%

28%

67%




Al2(SO4)3 + 3Ca(OH)2 2Al(OH)2 + 3CaSO4

1 2 3 4 5

0% 0%

28%

67%

6%




2C6H14 + 19O2 12CO2 + 14H2O + heat

1 2 3 4 5

0% 0%

89%

6%6%




BaO + H2O Ba(OH)2

1 2 3 4 5

88%

0% 0%

12%

0%




2NaNO3 2NaNO2 + O2

1 2 3 4 5

0%

89%

0%6%6%




AgNO3 + NaCl AgCl + NaNO3

1 2 3 4 5

0% 0% 0%0%0%




2Al + 3ZnCl3 3Zn + 2AlCl3

1 2 3 4 5

0% 0% 0%0%0%




What does a combustion reaction require?

1 2 3 4 5

0% 0% 0%0%0%

1. Heat2. Oxygen3. Carbon dioxide4. Love5. Gasoline

Which type of reaction?

1. Al2(SO4)3 + 3Ca(OH)2 2Al(OH)2 + 3CaSO4

2. 2C6H14 + 19O2 12CO2 + 14H2O + heat

3. BaO + H2O Ba(OH)2

4. 2NaNO3 2NaNO2 + O2

5. AgNO3 + NaCl AgCl + NaNO3

6. 2Al + 3ZnCl3 3Zn + 2AlCl3

7. What does a combustion reaction require?

of Single Replacement Reactions

Predicting Products

A + BX → B + AX

The lone element replaces one of the two elements in the compound. It tries to replace the element it is most

similar to (metals replace metals, non-metals replace non-metals)

If the lone element is more reactive than the element it’s trying to replace.

Be sure to write correct formulas for each new compound you make!

How do you know which elements replace other elements?

Metals: Look at an Activity Series

Replace elements below them on this list.

How do you know which elements replace other elements?

Halogens (Group 17): replace elements under them on the periodic table

FClBrI

Examples

1. Mg + HCl →

2. Al + Pb(NO3)2 →

3. KI + Br2 →

4. Cu + AlCl3 →

Practice Problems!1. Mg + CdCl2 →

2. Al + ZnCl2 →

3. F2 + MgBr2 →

4. Zn + CuCl2 →

5. Cl2 + NaBr →

6. Ca + HCl →7. I2 + NaCl →

8. Br2 + CaI2 →

9. Iron reacts with copper (II) nitrate… (use Fe3+)

If you finish early, go back and balance each equation.

Homework

Week 21 Part 0: tomorrow Week 21 Page 1: tomorrow

If you don’t know the charge of a transition metal (Sn, Cu, Fe, etc.) use 2+

Zn is always 2+ Ag is always +

A: 3 February 2012

Take Out: Week 21 HW p. 2 Objective: You will be able to:

explore mole ratios in a chemical reaction by modeling the process with s’mores!

Do now: 2H2(g) + O2(g) → 2H2O(g)

a. How many moles of hydrogen gas react with 1 mole of oxygen gas?

b. How many moles of water vapor are produced by the reaction of 10 moles of H2 gas?

Agenda

I. Do nowII. Check homeworkIII. S’mores lab instructionsIV. Carry out the labV. Collect and analyze data, answer post

lab questionsVI. Mole ratios practiceHomework: Complete the S’mores lab

packet: TuesdayWeek 21 Homework p. 2-3

Check homework

Lab Expectations

Stay at your station and with your group.

Stay on task. Be thoughtful about the volume of

your voice; talk only with your group members.

Be responsible and careful with the lab materials and equipment.

Clean up after yourself before you move on to the post lab questions.

With your group…1. Read p. 1 and complete page 2

through #3.2. Send your supply monitor to the front

to pick up your supplies. 3. Continue with page 3. Be sure to use

waxed paper on the balance to keep your ingredients clean!

4. Once you have completed p. 3 #7, eat your s’more!

5. Then, clean up and begin the Post Lab Questions on p. 3

6. Entire packet due Tuesday – lab grade!

Homework

Complete the lab packet: Tues. Go to the blog

www.phascience.wordpress.comand click “10th Grade Chemistry”

Watch the YouTube video – first link on the page. Do the “Your turn” questions in your notebook: due Tuesday

http://www.phascience.wordpress.com/

C: 3 February 2012

Take Out Homework: S’mores lab Objective: You will be able to:

use a balanced chemical equation to calculate mole ratios in a reaction.

Do now: 2G2 + M + 10C → G4MC10

How many s’mores could you make if you had 4 graham crackers (each one = G2), 5 marshmallows and 25 chocolate chips? Explain how you got your answer.

What would you have left over?

Agenda

I. Do nowII. Mole ratio notes and examplesIII. Practice problemsHomework: Week 21 Homework p. 2-

3 due Mon.

For one sandwich:1 roll 1 slice 2 slices 1 leaf 2 slicesYou have2 rolls 5 slices 6 slices 4 leaves 8 slices

What is the limiting ingredient?Which ingredients are in excess?

Mole Stoichiometry

How are quantities of reactants and products related in a chemical reaction?

4Fe(s) + 3O2(g) 2Fe2O3(s)

SWBAT calculate mole relationships for chemical reactions.

4Fe(s) + 3O2(g) 2Fe2O3(s)1. How many moles of oxygen gas react

with 4 moles of solid iron?2. How many moles of iron (III) oxide are

produced by the reaction of 3 moles of oxygen gas?

3. How many moles of solid iron are required to react with 3 moles of oxygen gas?

4. How many molecules of iron (III) oxide are produced by the reaction of 4 molecules of solid iron?SWBAT calculate mole relationships for chemical reactions.

4Fe(s) + 3O2(g) 2Fe2O3(s)

5. How many moles of O2 react with 8 moles of Fe?

6. How many moles of Fe2O3 react with 2 moles of Fe?

7. How many moles of Fe react with 12 moles of O2?



Mole Ratio Practice

with your partner Page 1 #1-4

What if more than simple math is involved?


4Fe(s) + 3O2(g) 2Fe2O3(s)


2. How many moles of Fe2O3 are produced by the reaction of 20.0 moles of O2?

3. How many moles of Fe react with 1.2 moles of O2?

4. How many moles of Fe are required to produce 7.0 moles of Fe2O3?


4Fe(s) + 3O2(g) 2Fe2O3(s)


6. How many moles of Fe2O3 are produced by the reaction of 8.0 moles of O2?

7. How many moles of Fe react with 1.8 moles of O2?

8. How many moles of Fe are required to produce 13.0 moles of Fe2O3?


Moles Ratio Practice

finish p. 1-2 Begin your homework

Homework

Week 21 page 2-3: Tues. S’mores Lab: Tues Extra help:Go to the blog

www.phascience.wordpress.comand click “10th Grade Chemistry”

Watch the YouTube video – first link on the page.

http://www.phascience.wordpress.com/


with 2 moles of solid iron?2. How many moles of iron (III) oxide

are produced by the reaction of 1.0 mole of oxygen gas?

3. How many moles of oxygen gas are required to produce 0.35 moles of iron (III) oxide?

4. How many moles of solid iron are required to produce 0.5 moles of iron (III) oxide?SWBAT calculate mole relationships for chemical reactions.


with 10.5 moles of solid iron?2. How many moles of iron (III) oxide are

produced by the reaction of 2.0 mole of oxygen gas?



Homework

Week 21 Homework page Need more help? search YouTube: “phachemistry mole stoichiometry”and watch the first video that comes

up!

A: 7 February 2012

Take Out: S’mores lab Objective: You will be able to:

use mole ratios to calculate amounts of reactants and products in a chemical reaction.

Do now: N2(g) + 3H2(g) → 2NH3(g)

a. How many moles of nitrogen gas react with 3 moles of hydrogen gas?

b. How many moles of ammonia (NH3) are produced by the reaction of 5 moles of nitrogen gas?

Agenda

I. Do nowII. More moles ratio examplesIII. Practice problemsIV. Exit TicketV. Mass stoichiometry examplesVI. Practice problems Homework: Week 22 Homework p.

1: Fri.Quiz on 5.3 through 5.6 Quiz: Fri.

4Fe(s) + 3O2(g) 2Fe2O3(s)

1. How many moles of oxygen gas react with 2 moles of solid iron?

2. How many moles of iron (III) oxide are produced by the reaction of 1.0 mole of oxygen gas?


4. How many moles of solid iron are required to produce 0.5 moles of iron (III) oxide?


with 10.5 moles of solid iron?2. How many moles of iron (III) oxide are

produced by the reaction of 2.0 mole of oxygen gas?



What if…

we start with mass instead of moles?!

Homework

Week 22 Homework p. 1: Fri. Quiz on 5.3 through 5.6 Quiz: Fri.

A: 10 February 2012

Take Out Homework: Week 22 p. 1 Objective: You will be able to:

show what you know about objectives 5.3 through 5.6 on a quiz.

use mole ratios to calculate masses of reactants and products in a chemical reaction.

Do now: Predict the products:I2(s) + CaCl2(aq) →

Agenda

I. Do nowII. Exit ticket statistics and self-

assessmentIII. 5.3 through 5.6 QuizIV. Mass stoichiometry practice!Homework: Week 22 Homework p. 2-

3: Thurs.

Percent of section C students earning each score

16%

222%

2.511%

361%

Percent of section A students earning each score

17% 2

13%

2.513%

360%

47%

Another statistic

60% of you didn’t use the correct number of significant figures!

4Fe(s) + 3O2(g) 2Fe2O3(s)

Example 1:How many grams of iron (III) oxide

are produced by the reaction of 10.0 grams of solid iron in excess oxygen.

4Fe(s) + 3O2(g) 2Fe2O3(s)

Example 2 How many grams of oxygen gas

react with 5.00 grams of solid iron?

4Fe(s) + 3O2(g) 2Fe2O3(s) Your turn:

1. How many grams of iron (III) oxide are produced by the reaction of 3.00 grams of solid iron in excess oxygen?

2. How many grams of iron react with 50.0 grams of oxygen gas?

3. How many grams of oxygen gas are required to produce 15.0 grams of iron (III) oxide?

Challenge!

Solid calcium reacts with iron (III) nitrate. How many grams of calcium are required to produce 5.00 grams of iron as a product?

Homework

Week 22 Homework pages 2-3: Tuesday

C: 9 February 2012

Take Out Homework: Week 22 p. 2-3 Objective: You will be able to crack a

code by balancing equations and making mole and mass calculations.

Do now: C(s) + O2(g) → CO2(g)

a. Balance this equation.b. How many grams of carbon are

required to produce 100.0 grams of carbon dioxide? Round to the correct number of significant figures.

Agenda

I. Do nowII. Check homeworkIII. Crack the code challenge!Homework: Week 22 Homework p. 4-

5

Crack the Code! At each station, work with your group (and only

your group) to:1. Write and balance the reaction.2. Identify the type of reaction.3. Arrange the cards to show the work that

solves the problem at the station.4. Copy down this work, calculate, and record

your answer to the correct number of sig. figs.5. Flip the cards over and record part of the

code.

6. Use the code to figure out the message on p. 3

Your grade will be based on:

20 points for your work on the handout, due at the end of the class.

10 points for your citizenship: working with your group at the

station staying on task and following

directions maintaining a professional volume

of voice

10 minutes per station. Don’t move on until I tell you to! If you finish a station early, work on

homework problems.

Homework

Week 22 Homework p. 4-5

C: 17 February 2012

Take Out: CSI and Stoich lab Objective: You will be able to:

determine the limiting reagent in a chemical reaction.

Do now: Describe in one complete sentence why the confirmatory test was required to make a good case against Omar, your prime suspect.

Agenda

I. Do nowII. Collect CSI labIII. Limiting Reagent examples and

problemsHomework: Limiting Reagent

Worksheet: finish. Due Mon.

H2 + 2O2 → 2H2O

Vocab

Limiting reagent: the reactant that limits or determines the maximum amount of product that can be formed in a reaction.

Excess reagent: reactant that is not completely reacted; extra

Ex. 12Na(s) + Cl2(g) 2NaCl(s)

If 5 moles of sodium is reacted with 2 moles of chlorine gas…a. What is the limiting reagent?b. How many moles of NaCl are produced?

Ex. 1bC2H4(g) + 3O2(g) 2CO2(g) + 2H2O(g)

If 2.70 moles of C2H4 (ethylene) is reacted with 6.30 moles of oxygen gas…a. What is the limiting reagent?b. How many moles of water are produced?

Complete the front page of the handout.

Ex. 22Na(s) + Cl2(g) 2NaCl(s)

If 2.0 grams of sodium is reacted with 3.0 grams of chlorine…a. What is the limiting reagent?b. How many grams of NaCl are produced?

Ex. 2bC2H4(g) + 3O2(g) 2CO2(g) + 2H2O(g)

If 5.00 grams of ethylene is reacted with 1.00 gram of oxygen gas…a. What is the limiting reagent?b. How many grams of water are produced?**c. How many grams of the excess product are left?**

Complete page 2 of the handout

Homework

Calculating limiting reagents handout back page

A: 17 February 2012

Take Out: CSI and Stoichiometry Lab

Objective: You will be able to use reaction chemistry and

stoichiometry to solve a crime! Do now: Have you ever watched a

crime drama on tv? What chemistry have you seen detectives and crime scene techs use?

Agenda

I. Do nowII. Lab intro and demoIII. Carry out lab part 3: Testing

suspect samplesIV. Lab part 4: Confirming your

findingsHomework: Complete lab packet

With your group

Summarize the article – 5 min.

As a class

Watch the demo, record observations and discuss

Complete the demonstration questions

With your lab group

Read the four suspect profiles Collect materials Carry out part 3: testing the suspect

samples and unknown Collect careful and complete data

Clean up your materials and return them to the kidney table

Answer questions on page 7

Materials

We don’t have enough for each group. Share with groups around you!

Work really carefully and use only the amount specified in the procedure.

Make really complete observations about color, transparency, pH, texture, gas bubbles, etc!

Homework

CSI lab through page 8: Thursday Read pages 8-9 so you’re ready to

go tomorrow!

C: 16 February 2012

Take Out: CSI and Stoichiometry lab Objective: You will be able to:

perform confirmatory tests to determine the identity of the criminal!

Do now: The unknown white substance is _____________ because when I tested it with ___________, I observed _____________. Complete this TWICE.

Agenda

Do now CSI Stoichiometry lab part 4 Post Lab questionsHomework: Complete CSI and

Stoichiometry lab: tomorrowQuiz on 5.7: Mass to mass

stoichiometry: tomorrow

Confirmatory Tests!

What do we know so far? Why do a confirmatory test? How do we do a confirmatory test?

Massing

Use the same balance each time. Never mass a hot evaporating dish! Record your data as you collect it.

How will you know all the water has been evaporated?

Clean up!

After you clean up

With your group, quietly, complete the rest of the lab packet to show hard evidence to prove the identity of the unknown white solid.

Check your lab packet for high quality work and perfect completion.

Turn it in.

Homework

Complete lab packet: tomorrow Quiz on 5.7 tomorrow

You can use your note card or sticky note.

C: 29 February 2012

Get out Homework: Metacog. Part 1 Objective: You will be able to:

determine the limiting reagent and calculate percent yield.

review unit 5 objectives Do now: Nitrogen monoxide gas reacts

with oxygen gas to produce nitrogen dioxide gas.

If 2.00 grams of nitrogen monoxide gas react with excess oxygen gas, calculate the mass of nitrogen dioxide gas formed.

Agenda

I. Do nowII. Review stoichiometryIII. A poemIV. Limiting reagentsV. Percent yield VI. Review all unit 5 objectivesHomework: Week 24 Homework p. 1-3Finish Unit 5 ReviewQuiz on ALL of Unit 5 on tomorrow

Limiting Reagents - Moles

2NO(g) + O2(g) → 2NO2(g)

1. a. If 5.00 moles of nitrogen monoxide react with 5.00 moles of oxygen gas, which is the limiting reagent?b. How many moles of nitrogen dioxide gas are produced?

Limiting Reagents - Grams

2NO(g) + O2(g) → 2NO2(g)

1. a. If 3.00 grams of nitrogen monoxide react with 1.00 grams of oxygen gas, which is the limiting reagent?b. How many grams of nitrogen dioxide gas are produced?

A: 1 March 2012

Take Out: Week 24 Homework p. 1-2and Metacog. Worksheet

Objective: You will be able to: review Unit 5 objectives for a quiz

Do now: 2NO(g) + O2(g) → 2NO2(g)

a. If 2 moles of NO are reacted with 2 moles of O2, which is the limiting reagent?

b. How many moles of NO2 are produced?

Agenda

I. Do nowII. Track your exit ticket (5.7)III. Limiting reagent homeworkIV. Unit 5 Review sheet work timeHomework: Finish Unit 5 review

sheetQuiz on all Unit 5 objectives (except

5.9) tomorrow

10 Point Class Work Assignment

Criteria: Work with your assigned partner Stay on task Stay in your seat Use a professional volume of voice Ask for help when you need it!

Until the bell rings:

Week 24 Homework p. 1-2 Unit 5 Review (skip #18)

Stay in seat Moderate the volume of your voice Don’t fall off!!

C: 1 March 2012

Take Out: Week 24 p. 1-2 and Unit 5 Review

Objective: You will be able to: show what you know about Unit 5

objectives explain the difference between

memorizing and understanding Do now: Get your clicker!

Agenda

I. Do nowII. Review Unit 5III. Quiz on Unit 5IV. More metacognition: Memorization

vs. UnderstandingV. Percent YieldHomework: Week 24 p. 3 and

Metacognition Part 2 worksheet: Fri.

2NO(g) + O2(g) → 2NO2(g)

1. a. If 3.00 moles of nitrogen monoxide react with 1.50 moles of oxygen gas, which is the limiting reagent?b. How many moles of nitrogen dioxide are produced?

2. a. If 100. grams of nitrogen monoxide react with 50.0 grams of oxygen gas, which is the limiting reagent?b. How many grams of nitrogen dioxide are produced?

Begin pages 1-2 of your homework.

C: 2 March 2012

Objective: You will be able to: calculate percent yield explain the difference between

memorizing and understanding Do now: If you calculated that your

theoretical yield should be 4.00 grams, but your experiment only produced 3.75 grams, what is your percent yield?

Agenda

I. Do nowII. Percent YieldIII. More metacognition: Memorization

vs. Understanding

Homework: Week 24 p. 3-4 and Metacognition Part 2 worksheet: Mon.

C2H4(g) + 3O2(g) 2CO2(g) + 2H2O(g)

If you calculate that the reaction of 5.00 grams of ethylene with 3.00 grams of oxygen will yield 2.75 grams of carbon dioxide, should you expect the actual reaction to really yield exactly that much? Why or why not?

Percent Yield

Vocab

Theoretical yield: maximum amount of product that could be formed given the amounts of reactants.

(Calculated on paper.)Experimental yield: the amount of

product that actually forms during an experiment

(Determined by doing an experiment.)

Equation

Percent Yield is usually < 100%

Why?• Reaction not going to completion• Impure reactants• Side Reactions: a product reacts with

a reactant• Loss during filtration or pouring

between containers

Quicklime

Limestone (calcium carbonate) is heated to 900oC to produce quicklime (calcium oxide) and carbon dioxide gas.

Quicklime is used to decrease the acidity of fields to increase crop yield and to make concrete and other industrial products.

It was key for the rise of civilization in Europe!

Ex. 1CaCO3(s) → CaO(s) + CO2(g)

You calculate that, with the masses of reactants used, your experiment should have yielded 3.00 grams of solid calcium oxide. However, you only got 2.00 grams of calcium oxide. Calculate the percent yield.

Ex. 2CaCO3(s) → CaO(s) + CO2(g)

a. What is the theoretical yield of CaO if 24.8 grams of CaCO3 is heated?

b. What is the percent yield if 13.1 g CaO is actually produced?

Ex. 3Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)

When 84.8 g of iron (III) oxide reacts with an excess of carbon monoxide, 54.3 g of iron is produced. What is the percent yield?

Practice Problems!Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2(g)

1. You calculate that your reaction should have produced 10.0 g of iron, but only 6.8 grams were produced. What is the percent yield?

2. When 10.0 g of iron (III) oxide reacts with an excess of carbon monoxide in an experiment, only 6.45 g of iron is actually produced. What is the percent yield?

3. When 5.00 g of iron (III) oxide is reacted with 1.00 g carbon monoxide, 1.20 grams of iron is produced. What is the percent yield? (Hint: Calculate the limiting reagent FIRST!)

Homework

Week 24 p. 3-4 Metacog. worksheet part 2

c: 12 january 2012

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