As come in, The Materials: Paper, pencil, calculator, periodic table for Cumulative Quiz Paper, pencil, calculator, and yesterday’s handout for Review.

As come in,• The Materials:

• Paper, pencil, calculator, periodic table for Cumulative Quiz• Paper, pencil, calculator, and yesterday’s handout for Review• TURN IN THE LAB AT THE FRONT OF THE ROOM. NO LATE

ASSIGNMENTS TODAY. GRADES ARE DUE TOMORROW.

• The Plan:• Solutions Cumulative Quiz• Acid/Base Review• Discuss final exam review

• The Assessment:• LAST UNIT TEST TOMORROW!!

ACID/BASE UNIT REVIEWREVIEW

Properties of Acids and Bases• Individually:

• Take a few minutes to prepare a list of at least six properties of acids. Then, make a list of at least six properties of bases.

• With your Partner:• Compare your two lists. • Did you forget anything? Did you make a mistake?

Check your notes to make sure that you’ve got all of the properties straight.

• Worth your time?• 24 points on the 100 point test

Define an acid.• Individually:

• Write the Arrhenius theory of acids in your own words. Be sure to give an example to support your definition.

• Write the Bronsted-Lowry definition of acids. Find an example in your notes to support your definition.

• With your Partner:• Compare your definitions and examples with your

partner.• Do you have any questions?• Are your partner’s definitions correct? HELP ONE

ANOTHER!

Define a base.• Individually:

• Write the Arrhenius theory of bases in your own words. Be sure to give an example to support your definition.

• Write the Bronsted-Lowry definition of bases. Find an example in your notes to support your definition.

• With your Partner:• Compare your definitions and examples with your

partner.• Do you have any questions?• Are your partner’s definitions correct? HELP ONE

ANOTHER!

Practice defining acids and bases.

Looking at the formula Al(OH)3, we would assume that

a)this is a base

b)this has a pH of 7

c)this is an acid

d)the concentration is stable

According to the Bronsted-Lowry model, an base is a(n) •H+ acceptor•proton donor•H+ ion producer•OH- ion producer•none of these

Which represents a conjugate acid-base pair?

a)H2O, H3O+

b)OH-, HNO3

c)H2SO4, SO42-

d)HC2H3O2, C2H3O2-

Identify the acid, base, conjugate acid, and conjugate base.

H2SO4 + H2O --> H3O+ + HSO4-

NH3 + H2O --> OH- + NH4+

WORTH YOUR TIME? 16 pts on 100 pt. test

Differentiate between strong acid and weak acid.

• Individually:• Read the following statement: Acids dissociate in water to form

H+ ions. Some acids dissociate more readily than others. Strong acids dissociate completely to form the most H+ ions possible; while weak acids only dissociate partially.

• With your Partner:• Where did you hear “strong acid” or “weak acid” used in this

unit?• Choose the correct answer:

Solid hydrogen sulfate partially dissociates when added to water to produce an aqueous solution of HSO4

- and H3O+. Therefore, sulfuric acid is aa)strong acidb)weak acidc)conjugate acidd)none of these

Understanding the Kw equation

• Individually:

• Write the kw equation.

• Write a sentence that explains when this equation should be used.

• With your Partner:• Check your equation.• Compare your explanations of the usefulness of this

equation.• Worth your time?

• 14 pts to 30 pts on 100 pt test

Understanding the pH equation• Individually:

• Write the pH equation.• Write a sentence that explains when this equation

should be used.• Fill in the blanks: The pH scale goes from ___ to ____.

Acids have a pH _____ 7, and bases have a pH ____ 7.• With your Partner:

• Check your equation.• Compare your explanations and answers to the fill in the

blank statement.• Worth your time?

• 21 pts on 100 pt test

Understanding the pOH equation• Individually:

• Write the pOH equation.• Write a sentence that explains when this equation

should be used.• How is the pOH equation different from the pH

equation?• With your Partner:

• Check your equation.• Compare your explanations.

• Worth your time?• 16 pts on 100 pt test

Understanding the relationship between pH and pOH• Individually:

• Write the equation that includes both pH and pOH.• Write a sentence that explains when this equation

should be used.• With your Partner:

• Check your equation.• Compare your explanations.

• Worth your time?• 16 pts on 100 pt test

Practice Kw, pH, and pOH calculations.• Check your answers to yesterday’s handout. • Solve.

• During the course of the day, human saliva varies between acidic and basic. What is the [H+] in saliva if [OH-] is 3.16x10-8M? What is the pH of the saliva? At this point in the day, is it acidic, basic, or neutral?

• What is the concentration of OH- ions in 0.1M bicarbonate of soda if [H3O+] is 3.98x10-9M? Is the bicarbonate acidic, basic, or neutral? What is the pH? What is the pOH?

• What is the concentration of H3O+ ions in eggs if [OH-] is 6.0x10-7M? Are eggs acidic, basic, or neutral?

• If the pH of a solution is 6.4, what is the [OH-]?• Find the [H+] and [OH-] of a solution with a pH of 3.494.• For each pair of concentrations, tell which represents the more acidic

solution.1. [H+] = 0.000013 M or [OH-] = 0.0000032 M2. [H+] = 1.03x10-6 M or [OH-] = 1.54x10-8 M

Understanding titrations• Individually:

• Fill in the blanks. Every time that an acid and a base react in a neutralization reaction, a _____ and ______ are produced.

• Solve: A volume of 20-mL of 0.25M Al(OH)3 neutralizes a 75-mL sample of H2SO4 solution. What is the concentration of the acid?

• Solve: Calculate how many milliliters of 0.30M H2SO4 must be added to titrate 75 mL of 0.10 M KOH.

• With your Partner:• Check your fill in the blank statement.• Compare your balanced equations with your partner.• Compare your work and answers to the two calculations.• NOTE: IF SOMEONE HAS TOLD YOU ABOUT A SHORT-CUT

(MAVA = MBVB), FORGET IT. IT DOES NOT WORK CONSISTENTLY.

• Worth your time?• 10 pts on 100 pt test