Chem II: 1/5/14 Objectives: Review Classroom Rules and Expectations Assess First Semester Exams...

Chem II: 1/5/14

Objectives:• Review Classroom Rules and Expectations• Assess First Semester Exams• Review Acid/Base Properties and Definitions

Homework:• First Semester Assessment-due tomorrow (1/6).• Acid/Base Properties and Definitions-review

Safe, Productive, and Engaging Classroom?

Analyze First Semester Exams

Acid/Base Definitions Review

• Review acid/base definitions tonight, because will be applying them tomorrow in class.

Acidic vs. Basic Properties

Acidic vs. Basic Properties-Period

Acidic/Basic Definitions-PeriodAcidic/Basic Definitions Acidic and Basic

DefinitionsExample

Arrhenius

Bronstead-Lowry

Lewis

Acidic/Basic DefinitionsAcidic/Basic Definitions Acidic and Basic

DefinitionsExample

Arrhenius

Bronstead-Lowry

Lewis

Acid/Base Review: Bell Ringer1. Identify the acid and base for each reaction

below. Determine which definition best classifies each reactant as an acid/base.

a. H2(SO4)(aq) + H2O (l) ----> H3O+ (aq) + HSO4- (aq)

b. BF3 (aq) + F-(aq) -----> BF4- (aq)

c. HNO3 (aq) + Al(OH)3(aq) -----> H2O (l) + Al(NO3)3 (aq)

2. Establish the net ionization reaction for 1c.




b. BF3 (aq) + F-(aq) -----> BF4- (aq)



Strong vs. Weak Acid/Base

• What distinguishes a strong acid/base from a weak acid/base?

Chem II: 1/6/14

Due: • Analysis of First Semester Exams-place in tray

Objectives:• I can identify acids and bases in a reaction. • I can distinguish between strong and weak acids/bases.

Homework:

Strong or Weak Acids/Bases

• Explain which reaction below consists of a strong acid and which consists of a weak acid.

a. HBr + H2O -----> H3O+ + HS-

b. H2S + H2O -----> H3O+ HS-

Strong Acids and BasesStrong Acids Strong Bases

HCl LiOH

HBr NaOH

HI KOH

HClO4 RbOH

HClO3 CsOH

HNO3 Ca(OH)2

H2SO4 Sr(OH)2

Ba(OH)2

Can the periodic table be helpful in identifying strong acids and bases?

Chem II: 1/8/14

Due:• Acid/Base ppt. slides • (Late): Analysis of First Semester Exams

Objectives:• I can name acids and bases.• I can identify acids and bases in a reaction. • I can distinguish between strong and weak acids/bases.

Homework:• Textbook Problems

Acid/Base Strength

• HF, H2S, H(NO3)

1. Name each of the following acids above:

2. Rank the following acids from strongest to weakest? Provide evidence on how you ranked them.



a. HBr + H2O -----> H3O+ + HS-

b. H2S + H2O -----> H3O+ HS-

Strength of Acids

http://wwwchem.csustan.edu/chem3070/images/acetic.gif

Acids vs. Bases

Degree of Dissociation

• Depends upon: EN(ions) difference vs. EN(ions/H2O) difference

en.wikipedia.org

http://en.wikipedia.org/wiki/Solvation

Chem II: 1/8/14




Chem II: 1/9/15




Conjugate Acids and Bases

• What are conjugate acids and bases?

• Which acid/base definition best describes acid/base conjugates?

Chem II: 1/9/15




Chem II Block: 1/12/15

Due: Textbook ProblemsObjectives:• I can identify acids and bases and their conjugate

pairs in a reaction based on the acid/base definitions.

• I can distinguish between strong and weak acids/bases.

• I can establish the net ionic equations of neutralization reactions.

• I can apply stoichiometry with neutralization reactions.

Bell Ringer: Conjugate Acids/Bases

• HF + H2O <----> F- + H3O+

a. Identify the conjugate acid/base pairs in the reaction above.

b. Explain which direction (forward or reverse) is favored.

Chem II Homework-Textbook Problems


Due: Textbook ProblemsObjectives:• I can identify acids and bases and their conjugate

pairs in a reaction based on the acid/base definitions.

• I can distinguish between strong and weak acids/bases.

• I can establish the net ionic equations of neutralization reactions.

• I can apply stoichiometry with neutralization reactions.

Mole Conversion Map

http://mysite.cherokee.k12.ga.us

Stoichiometry Map

Mole Conversion Map


Stoichiometry Applications

Water: Self-Ionization

• According to the text you read last night, what have scientists gained from studying the self-ionization of water?


• H2O + H2O H3O+ + OH-

• This is a reversible reaction. • Water is considered a weak electrolyte.• Draw the reversible arrows, indicating which

direction is more favorable.

Kw: Water Ionization Constant


Infinite Campus: Textbook problems (15pts.)Objectives:• I can identify acids and bases and their conjugate pairs

in a reaction based on the acid/base definitions. • I can distinguish between strong and weak acids/bases. • I can establish the net ionic equations of neutralization

reactions.• I can apply stoichiometry with neutralization reactions. • I can calculate the molar concentration of H+ and OH-

in aqueous solutions. • I can understand and calculate the pH and pOH values

of aqueous solutions.


Infinite Campus: Textbook problems (15pts.)Objectives:• I can identify acids and bases and their conjugate pairs

in a reaction based on the acid/base definitions. • I can distinguish between strong and weak acids/bases. • I can establish the net ionic equations of neutralization

reactions.• I can apply stoichiometry with neutralization reactions. • I can calculate the molar concentration of H+ and OH-

in aqueous solutions. • I can understand and calculate the pH and pOH values

of aqueous solutions.

Liming Streams Article

• Annotate article and write a summary about it. *Appropriately incorporate data from the quiz into your summary on “Liming Streams”.

• Due Thursday, Jan 22nd


• Annotate article and write a summary about it. *Appropriately incorporate data from the quiz into your summary on “Liming Streams”.

• Due Thursday, Jan 22nd


Due:• Liming Streams article summary Objectives:• I can apply stoichiometry with neutralization

reactions. • I can calculate the molar concentration of H+ and

OH- in aqueous solutions. • I can understand and calculate the pH and pOH

values of aqueous solutions.


• Always constant in water and dilute aqueous solutions.

• Temperature dependent, direct relationship.• The product of [H3O+] and [OH-]. Kw= [H3O+] [OH-] =


Due:• Molar concentration practice problems, pg. 484• Liming Streams article summary-LATE Objectives:• I can calculate the molar concentration of H+ and



Molar Concentration of Ions

pH Scale vs. [H3O+] concentration

Explain the relationship between the [H3O+] concentration and pH scale at neutral,acidic, and basic conditions.


Due:• Concentration of ions in aqueous solutions. • Liming Streams article summary-LATE Objectives:• I can calculate the molar concentration of H+ and



Bell Ringer: pH values

a. What is the pH of a 2.6x10-3 M HBr solution?

b. What is the pH of a 4.2x10-3 Na(OH) solution?

Aqueous Solutions: pH vs. pOH

Aqueous Solutions: Calculations

Exit Slip: Aqueous Solution Calculations

a. For

Acid/Base Reactions 1. Distinguish between acidic and basic properties; give applications of both (Venn diagram).2. a. Identify and distinguish between the three types of acid/base definitions. b. Which definition above best explains how you currently classify acids and bases? Explain your answer. c. Which definition above do you think classifies acids and bases the best? Explain your answer.

Acid/Base Reactions 1. Distinguish between acidic and basic properties; give applications of both (Venn diagram).2. a. Identify and distinguish between the three types of acid/base definitions. b. Which definition above best explains how you currently classify acids and bases? Explain your answer. c. Which definition above do you think classifies acids and bases the best? Explain your answer.

Chem II-Period Midterm Review

• Naming Cmpds.• Metric Conversions• Sig. Figs



Acidic vs. Basic Properties-Period

Acidic vs. Basic Properties


DefinitionsExample

Arrhenius

Bronstead-Lowry

Lewis

Acidic/Basic Definitions-PeriodAcidic/Basic Definitions Acidic and Basic

DefinitionsExample

Arrhenius

Bronstead-Lowry

Lewis

Acidic/Basic Definitions

1. Determine which type of base is represented in each reaction below (Arrhenius base, Bronstead-Lowry base, and Lewis base).

a. NaOH (s) ---------> Na+ (aq) + OH- (aq)b. HF (aq) + H2O (l) -----> F- (aq) + H3O+ (aq)

c. H+(aq) + NH3 (aq) ------> NH4+ (aq)

2. Identify which reactant below is the acid and the base. Which definition best explains your classification?

H2CO3 + H2O ------> HCO3- + H3O+

Chem II Block: 11.6.14

Objectives:• I can identify acids and bases in a reaction based

on the acid/base definitions. • I can distinguish between strong and weak

acids/bases. • I can establish the net ionic equations of

neutralization reactions.• I can identify the conjugate acid and conjugate

base in an acid/base reaction. • I can apply stoichiometry with neutralization

reactions.



a. HBr + H2O -----> H3O+ + HS-

b. H2S + H2O -----> H3O+ HS-


DefinitionsExample

Arrhenius

Bronstead-Lowry

Lewis

Acidic/Basic Definitions

1. Determine which type of base is represented in each reaction below (arrhenius base, Bronstead-Lowry base, and Lewis base).

a. NaOH (s) ---------> Na+ (aq) + OH- (aq)b. HF (aq) + H2O (l) -----> F- (aq) + H3O+ (aq)

c. H+(aq) + NH3 (aq) ------> NH4+ (aq)

2. Identify which reactant below is the acid and the base. Which definition best explains your classification?

H2CO3 + H2O ------> HCO3- + H3O+

Neutralization Reactions

Objectives:• Establish Net Ionic Equations• Apply Stoichiometry • Assigned textbook problems

Text Practice Problems

Stoichiometry Map

Mole Conversion Map



Due: Textbook ProblemsObjectives:• I can identify acids and bases in a reaction based on the acid/base

definitions. • I can distinguish between strong and weak acids/bases. • I can establish the net ionic equations of neutralization reactions.• I can apply stoichiometry with neutralization reactions. • I can identify the conjugate acid and conjugate base in acid/base

reactions. • I can calculate the molar concentration of H+ and OH- in aqueous

solutions. • I can understand and calculate the pH and pOH values of

aqueous solutions.

Homework Qts.




b. BF3 (aq) + F-(aq) -----> BF4- (aq)




• What are conjugate acids and bases?

• Which acid/base definition best describes acid/base conjugates?

Conjugate Acids/Bases

• HF + H2O F- + H3O+

• Strength of CA and CB:


Due: Textbook Problems due-place in tray. Objectives:• SRI Testing: password: LLeeper• I can identify the conjugate acid and conjugate

base in acid/base reactions. • I can calculate the molar concentration of H+ and




HCl LiOH

HBr NaOH

HI KOH

HClO4 RbOH

HClO3 CsOH

HNO3 Ca(OH)2

H2SO4 Sr(OH)2

Ba(OH)2

Can the periodic table be helpful in identifying strong acids and bases?


• Complete qts. 23 from textbook:Also, identify if the CA and CB are considered weak or strong.


Due: *those absent yesterday*: Textbook Problems due-place in tray. Objectives:• I can identify the conjugate acid and conjugate

base in acid/base reactions. • I can use the Kw constant to calculate the molar

concentrations of H3O+ and OH- ions. • I can associate pH values with molar

concentration of H3O+ions; pOH values with molar concentrations of OH-ions.


HCl LiOH

HBr NaOH

HI KOH

HClO4 RbOH

HClO3 CsOH

HNO3 Ca(OH)2

H2SO4 Sr(OH)2

Ba(OH)2

Identify ways in which the periodic table can help you remember strong acids and bases.

Acid/Base and Conjugate Pairs Review• HC2H3O2 + H2O H3O+ + C2H3O2

-

a. Identify the acid and base and their conjugate pairs.

b. Determine whether or not the acid and base or their conjugate pair is stronger.

c. Knowing which substances are stronger, predict which direction is favored in the reaction.

Acid/Base and Conjugate Pairs Review• HC2H3O2 + H2O H3O+ + C2H3O2

-




Acid/Base and Conjugate Pairs Review• HC2H3O2 + H2O ------> H3O+ + C2H3O2

-





HCl LiOH

HBr NaOH

HI KOH

HClO4 RbOH

HClO3 CsOH

HNO3 Ca(OH)2

H2SO4 Sr(OH)2

Ba(OH)2

Identify ways in which the periodic table can help you remember strong acids and bases.

Strengths of Acids and Bases


• According to the text you read, what have

scientists gained from studying the self-ionization of water?


• H2O + H2O H3O+ + OH-

• This is a reversible reaction. • Water is considered a weak electrolyte.• Draw the reversible arrows, indicating which

direction is more favorable.


• Always constant in water and dilute aqueous solutions.

• Temperature dependent, direct relationship.• The product of [H3O+] and [OH-]. Kw= [H3O+] [OH-] =


Due: *those absent yesterday*: Textbook problems (14, 16, 26, 32, 33) Infinite Campus: • Hydrogen Peroxide Lab (15pts.)• Acid/Base Textbook Problems (10pts.)Objectives:• I can identify the conjugate acid and conjugate base in

acid/base reactions. • I can use the Kw constant to calculate the molar

concentrations of H3O+ and OH- ions. • I can associate pH values with molar concentration of

H3O+ions; pOH values with molar concentrations of OH-ions.



Calculating [H3O+] and [OH-] Concentrations

A 1.0 x10-4 M solution of HNO3 has been prepared for a laboratory experiment. a. Calculate the [H3O+] of this solution.

b. Calculate the [OH-] of this solution.


Due: *those absent yesterday*: Textbook problems (14, 16, 26, 32, 33) Objectives:• I can identify the conjugate acid and conjugate


concentrations of H3O+ and OH- ions in solutions containing strong acids and bases.

• I can associate pH values with molar concentration of H3O+ions; pOH values with molar concentrations of OH-ions.


Due: Practice Problems from packet

Objectives:• I can use the Kw constant to calculate the molar




Due: *those absent yesterday*: Textbook problems (14, 16, 26, 32, 33) Objectives:• I can identify the conjugate acid and conjugate






pH value vs. [H3O+] concentration

a. What is the pH of a 2.6x10-3 M H2SO4 solution?

b. What is the pH of a 4.2x10-3 Na(OH) solution?

Aqueous Solutions

Aqueous Solutions Calculations

2.2x10-3 M HI solution at 25oC. a. Establish the ionization equation and identify

the acid, base, and conjugate pairs. b. Which direction is favored in the ionization

equation?c. Calculate the [H3O+] and the [OH-] in this

solution. d. What is the pH of this solution?e. What is the pOH of this solution? f. Using evidence above, prove why this is an

acidic solution.


2.4x10-3 M HNO3 solution at 25oC.

a. Establish the ionization equation and identify the acid, base, and conjugate pairs.

b. Which direction is favored in the ionization equation?c. Calculate the [H3O+] and the [OH-] in this solution.

d. What is the pH of this solution?e. What is the pOH of this solution? f. Using evidence above, prove why this is an acidic

solution.


5.4x10-3 M HClO4 solution at 25oC.



d. What is the pH of this solution?e. What is the pOH of this solution? f. Using evidence above, prove why this is an acidic

solution.


7.3x10-2 M HNO3 solution at 25oC.



d. What is the pH of this solution?e. What is the pOH of this solution?f. Using evidence above, prove why this is an acidic

solution.


3.7x10-4 HCl solution at 25oC. a. Establish the ionization equation and identify the

acid, base, and conjugate pairs. b. Which direction is favored in the ionization equation?c. Calculate the [H3O+] and the [OH-] in this solution.

d. What is the pH of this solution?e. What is the pOH of this solution?f. Using evidence above, prove why this is an acidic

solution.


Objectives:• I can identify the conjugate acid and conjugate




• I can use acid-base reactions to calculate concentration of unknown solutions.


Objectives:• I can identify the conjugate acid and conjugate





Brain Teaser: pH Values

• 0.1 M HCl• 0.1 M H2SO4

• 0.1 M HF

Weak Acids and Bases

• What are weak acids and bases?


• How can we calculate the [H3O+] and [OH-] concentration in solutions containing weak acids and bases?


Infinite Campus:• Aqueous Solution Concentration Quiz (8pts.)Objectives:• I can identify the conjugate acid and conjugate base in



• I can associate pH values with molar concentration of H3O+ions; pOH values with molar concentrations of OH-

ions. • I can use acid-base reactions to calculate concentration of

unknown solutions.



http://www.sensorland.com/HowPage037.html



http://www.sensorland.com/HowPage037.html

Acid-Base Indicators

http://acid-base-titration.blogspot.com/


Objectives:• I can identify the conjugate acid and conjugate base in





unknown solutions.

Titrations and Molarity

Equivalence Point:

End Point:


Objectives:• I can identify the conjugate acid and conjugate base in





unknown solutions.

Titration Lab ResultsLab Group VA (final)

Trial 1VA (final) Trial 2

VA (final) Trial 3

VA (final) Average

% Yield

Group 1Group 2

Group 3

Group 4

Group 5

Group 6

Coal Article Debate-Monday

• Must record at least three supporting facts to support your view on this article. (Be ready to defend your view)

• Must cite resources for supporting facts. You must have at least two authentic/reputable resources.

Acid/Base Review

• Test will be Tuesday

Acid/Base Review


Due:• Neutralization Titration Labs (12pts.)• Coal Article Debate: supporting evidence/sourcesObjectives:• I can identify the conjugate acid and conjugate base in





Coal Article Debate

• Socratic Seminar over Coal Article Debate• Students in desks will discuss for 10min. Then

rotate.• Must participate for full credit.

Titrations and Molarity: Bell Ringer

1. The molarity of a NaOH solution can be determined by titrating a known volume of the solution with a HCl solution of known concentration. If 19.1 mL of 0.118M HCl is required to neutralize 25.00 mL of a NaOH solution, what is the molarity of the NaOH?

2. If 8.6 mL of 0.0994 M HNO3 is required to neutralize 25.00 mL of a Sr(OH)2 solution, what is the molarity of the Sr(OH)2?

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Chem II: 1/5/14 Objectives: Review Classroom Rules and Expectations Assess First Semester Exams...

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