Question 1

The solubility of copper(II)oxalate is 3.2 $\times$ 10-3 g/L.What is the solubility product constant for copper(II)oxalate?

Accepted Answer

A)  4.4 $\times$ 10-10 
B)  2.1 $\times$ 10-5 
C)  1.0 $\times$ 10-5 
D)  3.1 $\times$ 10-18 
E)  3.7 $\times$ 10-14 
A)  4.4 $\times$ 10-10 
B)  2.1 $\times$ 10-5 
C)  1.0 $\times$ 10-5 
D)  3.1 $\times$ 10-18 
E)  3.7 $\times$ 10-14

Question 2

The hydroxide ion concentration of a saturated solution of Cu(OH)2 is   M.What is the solubility product constant for Cu(OH)2?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 3

The concentration of Pb2+ in an aqueous solution is 5.5  $\times$ 10-3 M.What concentration of SO42- is required to begin precipitating PbSO4? The Ksp of PbSO4 is 2.5  $\times$ 10-8.

Accepted Answer

A)  1.4  $\times$ 10-10 M 
B)  4.5  $\times$ 10-6 M 
C)  1.6  $\times$ 10-4 M 
D)  8.3  $\times$ 10-4 M 
E)  2.9  $\times$ 10-2 M 
A)  1.4  $\times$ 10-10 M 
B)  4.5  $\times$ 10-6 M 
C)  1.6  $\times$ 10-4 M 
D)  8.3  $\times$ 10-4 M 
E)  2.9  $\times$ 10-2 M

Question 4

What color change is exhibited by phenolphthalein during a titration of aqueous acetic acid with aqueous sodium hydroxide?

Accepted Answer

A)  colorless to pink 
B)  pink to colorless 
C)  green to yellow 
D)  yellow to blue 
E)  blue to yellow 
A)  colorless to pink 
B)  pink to colorless 
C)  green to yellow 
D)  yellow to blue 
E)  blue to yellow

Question 5

If the ratio of acid to base in a buffer increases by a factor of 10,the pH of the buffer

Accepted Answer

A)  increases by 1. 
B)  decreases by 1. 
C)  increases by 10. 
D)  decreases by 10. 
E)  remains unchanged. 
A)  increases by 1. 
B)  decreases by 1. 
C)  increases by 10. 
D)  decreases by 10. 
E)  remains unchanged.

Question 6

If 20 mL of 0.10 M NaOH is added to 35 mL of 0.20 M HC2H3O2,what is the pH of the resulting solution at 25°C? Ka for HC2H3O2 is 1.8 $\times$ 10-5 at 25°C.

Accepted Answer

A)  10.0 
B)  4.2 
C)  5.1 
D)  2.7 
E)  4.3 
A)  10.0 
B)  4.2 
C)  5.1 
D)  2.7 
E)  4.3

Question 7

Which of the following indicators is most suitable for the titration of a 25.00-mL sample of 0.140 M propionic acid,HC3H5O2,with strong base?

Accepted Answer

A)  alizarin yellow (transition pH range: 10.0-12.0) 
B)  methyl red (transition pH range: 4.2-6.3) 
C)  methyl orange (transition pH range: 3.1-4.4) 
D)  thymol blue (transition pH range: 8.0-9.6) 
E)  bromothymol blue (transition pH range: 6.2-7.6) 
A)  alizarin yellow (transition pH range: 10.0-12.0) 
B)  methyl red (transition pH range: 4.2-6.3) 
C)  methyl orange (transition pH range: 3.1-4.4) 
D)  thymol blue (transition pH range: 8.0-9.6) 
E)  bromothymol blue (transition pH range: 6.2-7.6)

Question 8

A volume of 25.0 mL of 0.100 M C6H5CO2H(aq)is titrated with 0.100 M NaOH(aq).What is the pH after the addition of 12.5 mL of NaOH? (Ka of benzoic acid = 6.3 $\times$ 10-5)

Accepted Answer

A)  2.60 
B)  4.20 
C)  5.40 
D)  7.00 
E)  8.60 
A)  2.60 
B)  4.20 
C)  5.40 
D)  7.00 
E)  8.60

The solubility of copper(II)oxalate is 3.2 $\times$ 10^-3 g/L.What is the solubility product constant for copper(II)oxalate?

The hydroxide ion concentration of a saturated solution of Cu(OH)₂ is M.What is the solubility product constant for Cu(OH)₂?

The concentration of Pb²⁺ in an aqueous solution is 5.5 $\times$ 10^-3 M.What concentration of SO₄^2- is required to begin precipitating PbSO₄? The K_sp of PbSO₄ is 2.5 $\times$ 10^-8.

What color change is exhibited by phenolphthalein during a titration of aqueous acetic acid with aqueous sodium hydroxide?

If the ratio of acid to base in a buffer increases by a factor of 10,the pH of the buffer

If 20 mL of 0.10 M NaOH is added to 35 mL of 0.20 M HC₂H₃O₂,what is the pH of the resulting solution at 25°C? K_a for HC₂H₃O₂ is 1.8 $\times$ 10^-5 at 25°C.

Which of the following indicators is most suitable for the titration of a 25.00-mL sample of 0.140 M propionic acid,HC₃H₅O₂,with strong base?

A volume of 25.0 mL of 0.100 M C₆H₅CO₂H(aq)is titrated with 0.100 M NaOH(aq).What is the pH after the addition of 12.5 mL of NaOH? (K_a of benzoic acid = 6.3 $\times$ 10^-5)

Basic Concepts of Chemistry

Mathlets Review: The Tools of Quantitative Chemistry

Atoms, molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Entropy and Free Energy

Principles of Reactivity: Electron Transfer Reactions

Environmental Chemistry Earths Environment,energy,and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

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Exam 18: Principles of Reactivity: Other Aspects of Aqueous Equilibria

The solubility of copper(II)oxalate is 3.2 ×\times× 10-3 g/L.What is the solubility product constant for copper(II)oxalate?

The hydroxide ion concentration of a saturated solution of Cu(OH)2 is M.What is the solubility product constant for Cu(OH)2?

The concentration of Pb2+ in an aqueous solution is 5.5 ×\times× 10-3 M.What concentration of SO42- is required to begin precipitating PbSO4? The Ksp of PbSO4 is 2.5 ×\times× 10-8.

What color change is exhibited by phenolphthalein during a titration of aqueous acetic acid with aqueous sodium hydroxide?

If the ratio of acid to base in a buffer increases by a factor of 10,the pH of the buffer

If 20 mL of 0.10 M NaOH is added to 35 mL of 0.20 M HC2H3O2,what is the pH of the resulting solution at 25°C? Ka for HC2H3O2 is 1.8 ×\times× 10-5 at 25°C.

Which of the following indicators is most suitable for the titration of a 25.00-mL sample of 0.140 M propionic acid,HC3H5O2,with strong base?

A volume of 25.0 mL of 0.100 M C6H5CO2H(aq)is titrated with 0.100 M NaOH(aq).What is the pH after the addition of 12.5 mL of NaOH? (Ka of benzoic acid = 6.3 ×\times× 10-5)

Basic Concepts of Chemistry

Mathlets Review: The Tools of Quantitative Chemistry

Atoms, molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Entropy and Free Energy

Principles of Reactivity: Electron Transfer Reactions

Environmental Chemistry Earths Environment,energy,and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

The solubility of copper(II)oxalate is 3.2 $\times$ 10^-3 g/L.What is the solubility product constant for copper(II)oxalate?

The hydroxide ion concentration of a saturated solution of Cu(OH)₂ is M.What is the solubility product constant for Cu(OH)₂?

The concentration of Pb²⁺ in an aqueous solution is 5.5 $\times$ 10^-3 M.What concentration of SO₄^2- is required to begin precipitating PbSO₄? The K_sp of PbSO₄ is 2.5 $\times$ 10^-8.

If 20 mL of 0.10 M NaOH is added to 35 mL of 0.20 M HC₂H₃O₂,what is the pH of the resulting solution at 25°C? K_a for HC₂H₃O₂ is 1.8 $\times$ 10^-5 at 25°C.

Which of the following indicators is most suitable for the titration of a 25.00-mL sample of 0.140 M propionic acid,HC₃H₅O₂,with strong base?

A volume of 25.0 mL of 0.100 M C₆H₅CO₂H(aq)is titrated with 0.100 M NaOH(aq).What is the pH after the addition of 12.5 mL of NaOH? (K_a of benzoic acid = 6.3 $\times$ 10^-5)