top 10 reasons to become a chemist - chemistry coursescourses.chem.psu.edu/chem112/fall/lecture...

CH112 FA12 LRSVDS 1

Dr. Lori Stepan Van Der Sluys

Section 001, MWF 8:00-8:50 am

Section 002, MWF 9:05-9:55 am

Email: [email protected]

Office Hours: Mondays 1 – 3 PM in 226C Ritenour

! "OR Email me 3 times you’re available for an appointment

REQUIRED MATERIALS

Required: Brown, LeMay, Bursten & Murphy; Chemistry: The Central

Science, 11th ed., 2009.

Required: Chem 112 FA12 Student Packet (orange)

Required: non-programmable scientific calculator

Optional: Volume 2 for Chem 112; partial text

Optional: Wilson Solutions to Exercises in Chemistry, The Central Science,

11th ed.

Top 10 Reasons to Become a Chemist:

CH112 FA12 LRSVDS 2

CH112 FA12 LRSVDS 3

Chem 110 Material:

!" Structure Affects Function

!" The Basics (Chapters 1-11, 13, 15)

!" Atomic and molecular structure

!" Properties of atoms and molecules

!" Chemical reactions

Chem 112 Material:

Look more closely at reactions

!" Will a reaction occur? (Thermodynamics)

!" How fast will it go? (Kinetics)

!" Nuclear Chemistry and Kinetics

!" What conditions are necessary to facilitate reactions? When is a reaction spontaneous?

!" Aqueous reactions

"" pH

"" buffers

"" solubility

!" Redox reactions and Electrochemistry

!" Descriptive Chemistry: metals, nonmetals

!" Materials Science; polymers, ceramics, semiconductors, alloys, biomaterials

!" Starting point for applications of 21st century

CH112 FA12 LRSVDS 4

Flaming Flask Demo

2 Al(s) + 3 CuCl2(aq) ! 2 AlCl3(aq)+ 3 Cu(s) 15 g 5.0 g

26.98 g/mole 134.5 g/mole

2 Al(s) + 6 HCl(aq) ! 2 AlCl3(aq)+ 3 H2(g) 15 g 100 mL of 12 M 26.98 g/mole

CH112 FA12 LRSVDS 5

Orbital Energy Levels

CH112 FA12 LRSVDS 6

Lectures

!"3 Lectures per week (M, W, F)

!"Bring printed out Lecture Notes from course website

!"Recitation at attendance is expected; add them to

your schedule. Topics, locations and times will be

posted on the website.

!" There is no such thing as a stupid question!

!" In-class problem solving

!" Demonstrations are part of the fun (and also on the

exam!)

CH112 FA12 LRSVDS 7

Homework

!" Is not collected or graded, HOWEVER this is important

preparation for on-line quizzes and exams.

!" Do BOTH the textbook and packet problems.

!" Ask questions about homework problems at office

hours and recitation.

!" TAs will hold office hours weekly.

!" Pre-Exam Review Sessions will be scheduled to go

over previous exams as practice (see recitation

schedule).

CH112 FA12 LRSVDS 8

CH112 FA12 LRSVDS 9

Online Midterm Exam 1 17%

Tues. Sept. 18, 6:30-7:45 PM


Wed. Oct. 16, 6:30-7:45 PM


Tues. Nov. 13, 6:30-7:45 PM

Final Exam 29%

Week of Dec. 17-21 Time: TBA

Exams: 80%

Online Checkpoint Tests 5%

Online Unit Quizzes 15%

Online Tests: 20%

Note the dates of these exams NOW!

Do not make plans to leave campus until the registrar

schedules our final exam!

CH112 FA12 LRSVDS 10

Computer-Based Tests

Two kinds of online tests on the Test site:

1.!Unit Quizzes: Your grade for each quiz will be the

highest of three attempts. Unit Quizzes will only be active for four days, Saturday through Tuesday

(deadlines end at midnight). Details are given

on the website or in the packet.

2.!Online Checkpoint Tests: These practice exams will be open one week before each actual exam,

and are due by 5:00 PM on the day of the exam.

Details are given on the website or in the packet.

No makeups are available for online tests; you

must take them by the required deadline.


•" You will only have access to these online quizzes for four days; most are

Saturday to Tuesday. •" Beginning and end dates are in your packet and on the website and Angel.

•" Each quiz will be unique, questions chosen from a databank. •" Each Quiz has 5 - 7 questions and takes about 15 – 30 minutes to complete.

•" You will have a 60 minute time limit for each test.

•" Your grade for the quiz will be the highest of three attempts, even if it is your first attempt.

NOTE: Each Deadline ends at MIDNIGHT the night of the date given.

The time of the attempt is the TIME of FINAL submission (not the time you begin the quiz)

Example: Deadline for Quiz 1 is Sept. 6

Start Quiz 1 at 11:30 pm on Sept. 6

Finish and submit the quiz at 12:11 am on Sept. 7 (after midnight) DOES IT COUNT??

Chem 112 Unit Quizzes


Quiz Topic Beginning date Due date for completion Material Covered

1. Kinetics Saturday Sept.8 Tuesday Sept. 11 Chapter 14

Exam 1

2. Nuclear S Sept. 15 T Sept. 18 Chapter 21

Exam 1

3. pH and Acid-Base Conjugates S Sept. 22 T Sept. 25 Chapter 16

Exam 2

4. Acid-Base Equilibria S Sept. 29 T Oct. 2 Chapter 17

Exam 2

5. Buffers, Titration S Oct. 6 T Oct. 9 Chapter 17

Exam 2

6. Thermochemistry - Entropy S Oct.13 T Oct. 16 Chapter 19

Exam 2

7. Thermochemistry – Free Energy S Oct. 20 T Oct. 23 Chapter 19

Exam 3

8. Solubility S Oct. 27 T Oct. 30 Chapter 17

Exam 3

9. Electrochemistry part 1 S Nov. 3 T Nov. 6 Chapter 20

Final

10. Electrochemistry part 2 S Nov. 10 T Nov. 13 Chapter 20

Final

11. Transition Metals S Dec. 3 T Dec. 6 Chapter 23, 24

Final

12. Bonding in Solids, Forces S Dec. 8 T Dec. 11 Chapter 11

Final

13. MO Theory, Materials Wednesday Dec. 12 Sunday Dec. 16 Chapters 9, 12

Final

Chem 112 Quizzes

Most Quizzes are Open Saturday to Tuesday


Info on Computer Based Tests 1.! Information and instructions

a) ! student packet

b)! Class Website (Choose the “Online Quizzes…” link)

2.! Take the tests

a) ! Class Website (link to Angel)

b)! Log on to Angel at https://cms.psu.edu and choose the correct folder in the lessons tab

3.! Scores will be in the Angel Gradebook

a) ! Angel Gradebook shows percentages; this is NOT the number

used to compute your final grade!

b)! Your individual quiz score is the highest of 3. Your individual

Checkpoint Test score is the highest of 2.

c) ! Your final quiz score is a summary; add all of the individual quiz

scores (out of 10). You only need 100/130 points for full credit.

d)! Your final Checkpoint test score is a summary; add individual test scores (out of 100), you need 300/400 points for full credit.


CHEMICAL KINETICS

Kinetics is the study of reaction rates.

Thermodynamics tells us if a reaction can occur and how much

energy is required (or given off) but not how fast. (More later)

Spontaneous reactions:

1. CH4 + 2O2 ! CO2+ 2H2O "Hrxn = - 802.3kJ

2.! H2 + 1/2 O2 ! H2O "Hrxn = - 241.8kJ

3. H2 + 1/2 O2 ! H2O "Hrxn = - 241.8kJ

Why is kinetics important?


AVERAGE VS. INSTANTANEOUS RATES

Rate: change that occurs in a given interval of time.

Average speed:

Example: a bus picks up children at a school at 3:00 pm, travels 4

miles to the first bus stop and arrives there at 3:10 pm. What is the rate of travel of the bus?

But the instantaneous rate is always changing:

At a red light?

On the highway?

Instantaneous rate =


Concentration of Reactant as a Function of Time

What does the slope of the blue line represent ("[X]/"t)?

A." an instantaneous rate

B." an average rate

C." both

D." neither

[X]0

time

"t

"[X]

[X] Slope of the line is

X ! Y!

[X] = concentration of X!


Chemical Rate Laws

describe instantaneous rates in terms of

! [reactant] or ! [product] "t "t

C4H9Cl(aq) + H2O(l) !!

C4H9OH(aq) + HCl(aq)!


•" Manage your time

Expect to spend ~10 hrs per week consistently

(lecture, reading, homework, online tests, exam prep)

•" Come to class

Sounds obvious (?!)

•" Seek help

""Do not wait to get help!

""If you fall behind in this class, you will be in serious trouble!

""Get help from the TA and tutors in the Chemistry Resource

Room (211 Whitmore: the CRC)

""Go to Supplemental Instruction!

•" Choose your friends wisely

Cooperative study groups - OK to do homework together

You must do online quizzes and skill check tests on your own.

Four keys to success in Chem 112



1."Read the text AND do all Chapter (text book)

problems BEFORE the lecture.

2."Get lecture notes and try any questions before

lecture.

3."Do supplemental multiple choice problems after

the lecture.

4."Pay attention to on-line test deadlines. There will

be no make-ups or second chances.

5."DO NOT put things off until the last minute or get

behind.


1. Dr. Lori Van Der Sluys [email protected]

Office Hours: 226C Ritenour

(Mondays 1 – 3 PM or by appointment; send email)

2. TA Gordon Zrelak

Office Hours in 211 Whitmore (CRC)

3. Recitations, Study Groups and Reviews: TBA

Monday and Tuesday

Wednesday and Thursday

See Schedule of Recitations posted on the website

4.! Supplemental Instruction; free Guided Study Group services for Chem 112, Info on class website under Supplemental Instruction.

5. Free tutoring in the CRC Sunday-Thurs. 6:30-10:30 PM

top 10 reasons to become a chemist - chemistry coursescourses.chem.psu.edu/chem112/fall/lecture...

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