Solution Unit

TEST

Friday

March the 21st

WOD and Video Quizzes

Introduction Video

• Take Notes

• Quiz to Follow

Activator – answer in your notebooks.

• The solution to your lunchtime hunger may be a mixture. There are different kinds of mixtures – some are the same throughout, while others are mixed unevenly. This picture shows a few of both kinds of mixtures.

• Which items in this picture are the same throughout? Which are unevenly mixed?

• Do you think the salad is the same kind of mixture as the grape juice? Why or why not?

SPS6: Students will investigate the properties of solutions.

a.Describe solutions in terms of solute and solvent.

EQ: How do different solutes with in solvents affect the behavior of a

solution.

Solution Suspen-sion

Vs.

Colloid

Solute SolventLabel each flap with the following:

A solution is a homogenous mixture in a single phase.

• salt water, air

steel, & tea

Types of solutions….• Gas in gas oxygen in nitrogen• Gas in liquid CO2 in water• Liquid in liquid alcohol in cola• Liquid in solid mercury in silver• Solid in liquid sugar in Kool aid• Solid in solid gold in nickel

Look alikes….• Suspension: a mixture

that looks homogeneous but settles over time.

• muddy water, blood & oil and vinegar

Look Alikes….

• Colloids: mixtures with very small particles that permanently float.

• Example: milk, shaving cream, jello, clouds, smoke

Parts of a Solution…• Solute- substance that is dissolved

• Solvent- substance that does the dissolving.

Identify the solute and solvent

Identify the solute and solvent

GAS BUBBLES

Universal Solvent = Water = aqueous

Types of solutes• Electrolyte –

solute that allows solution to conduct electricity

• NaCl in aqueous solution

• Non-electrolyte – solute does not allow solution to conduct electricity

• Sugar in aqueous solution

Factors Affecting Dissolving• Size of solute particles

• Temperature of solvent

• Agitation of solution

• Solubility of solute

Solubility – the amt of solute that can dissolve in a solvent (100 mL of water)

X

Saturated Solution:On the linePerfect ration of solute to solvent.

X

X

Super-saturated Solution : Above the lineTo much solute,No more of the solute will be dissolved.

Un-saturated Solution:Under the lineNot enough solute, if more solute is added it can still be dissolved.

Have out work sheet from yesterday.

• Make sure the last 4 questions are complete.

• Keep in mind:– Super = above the line– Saturated = on the line– Under = under the line

Practice Problem1. Which compound is the most soluble at 40 degrees?

2. Which solute’s solubility changes the least as temperature increases?

3. How many grams of potassium bromide will dissolve in 100 g of water at 70 degrees?

Examine the solubility curve and decide if the following solutions would be saturated, unsaturated or supersaturated?

1. 200 g of NaClO3 at 20 degrees

2. 40 g of salt at 60 degrees

3. 55 g of potassium bromide at 100 degrees

4.At what temperature would a solution of 100 g of KNO3 in 100 g of water be considered unsaturated?

Now Complete the Graphing Assignment.

• Make the graph – LINE GRAPH, with a key (3 lines).

• Extra graph paper provided if you mess up first graph – BUT, keep original for the data and questions portion.

• Answer the question in complete sentences – extra paper provided if needed.

• Staple all sheets together and turn in.

Names for Compounds

• 1. a) Salt = NaCl

b) You pick answer

c) You pick answer

d) NH4Cl = Ammonium Chloride

e) KNO3 = Potassium Nitrate

f) KI = Potassium Iodide

g) Match the compound with the symbol.

Acids, Bases, and SaltsThe strength of an

Acid or Base

Depends on the degree in which a

1. acid

2. Hydrogen ions

3.

Positive6. Salt

4. Base

5.

Negative

Hydroxide atoms

produce

In solution which are

produce

In solution which are

and combine to form

Get out your GRAY STUDENT LEARNING MAP and complete this!

SPS6: • D. Compare and contrast the components

and properties of acids and bases.

• E. Determine whether common household substances are acidic or basic.

• EQ: How are acids and bases different; what are some common household examples?

Activator• Many foods contain acids. For example,

vinegar is a solution of acetic acid that has been used for centuries to preserve food. Some foods are more acidic, while others are less. Many acids have a sour taste.

• LIST ANY 5 FOOD/DRINKS that you think are acidic.

Acids – substances that causes an increase in H+

ions in an aqueous solutionRelease

Characteristics of Acids• liquids• sour taste

• solutions conduct electricity• react with metals

Examples of AcidsHCl - Hydrochloric acid

H3BO3 - Boric Acid

H2SO4 - Sulfuric AcidAcetic acid - vinegarCitric acid - lemons, limes

Bases (alkaline) – substances that cause a decrease in H+ ions in an

aqueous solutionAbsorbing

Characteristics of Bases• solids

• bitter taste • solutions feel slippery• do not conduct electricity• do not react with metals

Examples of BasesNaOH - sodium hydroxide

Ca(OH)2 - calcium hydroxide

NH3OH - ammonium hydroxide

Soaps (lye), shampoos, “Drain-O”

Physical Science Name __________________________ Date _________ Period __________

Battery AcidSoda

Tomato Juice

Lemonade

Black Coffee Baking Soda

Bleach

Pure Water

Soapy Water

Drain Cleaner

Brain Pop on pH scale

• http://www.brainpop.com/science/matterandchemistry/phscale/

pH Scale - measures [H+]

Indicators - chemicals that change color in solns of different pH

Phenolphthalein – chemical that turns bright pink in bases but no change in acids

Which pH indicator is the most specific?

• pH paper

Litmus Paper

• When you think – Acid = Red– Bases = Blue

– So, when using the litmus paper use the opposite color.

– You want the paper to turn the color you associate the solution with.

Unit 8: Solutions Test Format

• 25 multiple choice

• Test Review Sheet will be posted on Ms. Weis webpage on MCA site.

• Check your answers.

Lab TIME – copy this onto white paper!

Vine-gar

Coke

NaOH

ABC

Lemon Juice

Milk

Lysol

HCl

Distilled Water

1 2 3 4 5

Neutralization Reactions

• Neutralization reaction - mixture of acid and base in correct proportions .

• Forms a neutral solution of water and a salt• Example: HCl + NaOH -- NaCl + H2O• Titration: add acid/base drop by drop until

end point is reached

http://tinyurl.com/72topdc

Make a poster.

Pick (5) pictures that represent the topics of

this unit.

Label the pictures with a WORD or PHRASE as to

why you picked it.

6.7 pH Milk2.5 pH Sports Drinks6 pH Beauty Products