Question 1

A compound that is a proton (H+) donor is a(n):

Accepted Answer

A)  salt. 
B)  solvent. 
C)  base. 
D)  acid. 
A)  salt. 
B)  solvent. 
C)  base. 
D)  acid. D

Question 2

Predict the products for 
HCl (aq) + NaOH (aq) F1F1F1S1F1F1F10.

Accepted Answer

A)  NaCl (aq) + H2O (l) 
B)  NaCl (aq) + NaOH (aq) 
C)  NaCl (aq) + HCl (aq) 
D)  NaCl (aq) + H2 (g) 
A)  NaCl (aq) + H2O (l) 
B)  NaCl (aq) + NaOH (aq) 
C)  NaCl (aq) + HCl (aq) 
D)  NaCl (aq) + H2 (g) A

Question 3

An aqueous solution is found to have an H+ concentration of 7.8 × 10-2 M. What is the concentration of OH- in this solution?

Accepted Answer

A)  1.3 × 10-13 M 
B)  7.8 × 1012 M 
C)  2.0 × 1010 M 
D)  7.8 M 
A)  1.3 × 10-13 M 
B)  7.8 × 1012 M 
C)  2.0 × 1010 M 
D)  7.8 M A

Question 4

In the following equilibrium, which species is the CONJUGATE BASE of compound b?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 5

A compound that increases the concentration of hydroxide ion in an aqueous solution is a(n):

Accepted Answer

A)  acid. 
B)  base. 
C)  salt. 
D)  solvent. 
A)  acid. 
B)  base. 
C)  salt. 
D)  solvent.

Question 6

The pH of an unknown solution is 2.1. Its [OH-] is:

Accepted Answer

A)  0.0079 M. 
B)  1.3 × 10-12 M. 
C)  3.2 × 102 M. 
D)  3.2 M. 
A)  0.0079 M. 
B)  1.3 × 10-12 M. 
C)  3.2 × 102 M. 
D)  3.2 M.

Question 7

Which statement is FALSE?

Accepted Answer

A)  Buffer systems keep pH within a narrow range. 
B)  A buffer is a solution containing a mixture of acidic and basic components that resist changes in pH. 
C)  An appropriate buffer is a mixture of a strong acid and its conjugate base. 
D)  An appropriate buffer is a mixture of a weak acid and its conjugate base. 
A)  Buffer systems keep pH within a narrow range. 
B)  A buffer is a solution containing a mixture of acidic and basic components that resist changes in pH. 
C)  An appropriate buffer is a mixture of a strong acid and its conjugate base. 
D)  An appropriate buffer is a mixture of a weak acid and its conjugate base.

Question 8

The net ionic equation for the reaction 
Cu (s) + 2 HNO3 (aq) F1F1F1S1F1F1F10 H2(g) + Cu(NO3)2 (aq) is:

Accepted Answer

A)  Cu (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu2+ (aq). 
B)  Cu (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu2+ (aq). 
C)  Cu (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu+ (aq). 
D)  Cu (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu+ (aq). 
A)  Cu (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu2+ (aq). 
B)  Cu (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu2+ (aq). 
C)  Cu (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu+ (aq). 
D)  Cu (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Cu+ (aq).

Question 9

Acids that completely ionize in water are:

Accepted Answer

A)  strong bases. 
B)  weak bases. 
C)  strong acids. 
D)  weak acids. 
A)  strong bases. 
B)  weak bases. 
C)  strong acids. 
D)  weak acids.

Question 10

Which solution will turn litmus paper blue?

Accepted Answer

A)  0.5 M NaOH 
B)  2.1 M HCl 
C)  4.5 M HC2H3O2 
D)  0.125 M HBr 
A)  0.5 M NaOH 
B)  2.1 M HCl 
C)  4.5 M HC2H3O2 
D)  0.125 M HBr

Question 11

The pH of an unknown solution is 8.5. Its [OH-] is:

Accepted Answer

A)  3.2 × 10-6 M. 
B)  3.2 × 10-9 M. 
C)  3.2 × 105 M. 
D)  3.2 M. 
A)  3.2 × 10-6 M. 
B)  3.2 × 10-9 M. 
C)  3.2 × 105 M. 
D)  3.2 M.

Question 12

An aqueous solution is found to have an H+ concentration of 2.0 × 10-4 M. What is the concentration of OH- in this solution?

Accepted Answer

A)  5.0 × 10-11 M 
B)  2.0 × 10-18 M 
C)  2.0 × 1010 M 
D)  4.0 M 
A)  5.0 × 10-11 M 
B)  2.0 × 10-18 M 
C)  2.0 × 1010 M 
D)  4.0 M

Question 13

What is the pH of a solution if [H+] = 1.0 × 10-9 M?

Accepted Answer

A)  6.0 
B)  9.0 
C)  8.6 
D)  5.4 
A)  6.0 
B)  9.0 
C)  8.6 
D)  5.4

Question 14

The neutralization reaction of barium hydroxide with aqueous hydrochloric acid (HCl) leads to what two products?

Accepted Answer

A)  H2O and BaCl 
B)  Ba(ClO2)2 and H2 
C)  HCl and BaOCl 
D)  BaCl2 and H2O 
A)  H2O and BaCl 
B)  Ba(ClO2)2 and H2 
C)  HCl and BaOCl 
D)  BaCl2 and H2O

Question 15

The net ionic equation for the reaction 
Zn (s) + 2 HNO3 (aq) F1F1F1S1F1F1F10 H2(g) + Zn(NO3)2 (aq) is:

Accepted Answer

A)  Zn (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn2+ (aq). 
B)  Zn (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn2+ (aq). 
C)  Zn (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn+ (aq). 
D)  Zn (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn+ (aq). 
A)  Zn (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn2+ (aq). 
B)  Zn (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn2+ (aq). 
C)  Zn (s) + 2 H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn+ (aq). 
D)  Zn (s) + H+ (aq) F1F1F1S1F1F1F10 H2(g) + Zn+ (aq).

Question 16

In the following equilibrium, which species is the CONJUGATE BASE of compound a?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
A)  a 
B)  b 
C)  c 
D)  d

Question 17

Which solution will turn litmus paper red?

Accepted Answer

A)  0.5 M KOH 
B)  2.1 M Mg(OH)2 
C)  4.5 M HC2H3O2 
D)  0.125 M KNO3 
A)  0.5 M KOH 
B)  2.1 M Mg(OH)2 
C)  4.5 M HC2H3O2 
D)  0.125 M KNO3

Question 18

Which acid will fully ionize in water?

Accepted Answer

A)  HClO 
B)  HF 
C)  HCl 
D)  HC2Cl3O2 
A)  HClO 
B)  HF 
C)  HCl 
D)  HC2Cl3O2

Question 19

A 25.0-mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH. What is the concentration of HBr in the unknown sample?

Accepted Answer

A)  3.8 M 
B)  2.4 M 
C)  1.7 M 
D)  0.55 M 
A)  3.8 M 
B)  2.4 M 
C)  1.7 M 
D)  0.55 M

Question 20

Identify the Brønsted acid in this reaction. 
H2SO4 (aq) + HNO3 (aq) F1F1F1S1F1F1F10 HSO4- (aq) + H2NO3+ (aq)

Accepted Answer

A)  H2SO4 (aq) 
B)  HNO3 (aq) 
C)  HSO4- (aq) 
D)  H2NO3+ (aq) 
A)  H2SO4 (aq) 
B)  HNO3 (aq) 
C)  HSO4- (aq) 
D)  H2NO3+ (aq)

A compound that is a proton (H⁺) donor is a(n):

Predict the products for HCl (aq) + NaOH (aq) .

An aqueous solution is found to have an H⁺ concentration of 7.8 × 10^-² M. What is the concentration of OH^- in this solution?

In the following equilibrium, which species is the CONJUGATE BASE of compound b?

A compound that increases the concentration of hydroxide ion in an aqueous solution is a(n):

The pH of an unknown solution is 2.1. Its [OH^-] is:

Which statement is FALSE?

The net ionic equation for the reaction Cu (s) + 2 HNO₃ (aq)  H₂(g) + Cu(NO₃)₂ (aq) is:

Acids that completely ionize in water are:

Which solution will turn litmus paper blue?

The pH of an unknown solution is 8.5. Its [OH^-] is:

An aqueous solution is found to have an H⁺ concentration of 2.0 × 10^-⁴ M. What is the concentration of OH^- in this solution?

What is the pH of a solution if [H⁺] = 1.0 × 10^-⁹ M?

The neutralization reaction of barium hydroxide with aqueous hydrochloric acid (HCl) leads to what two products?

The net ionic equation for the reaction Zn (s) + 2 HNO₃ (aq)  H₂(g) + Zn(NO₃)₂ (aq) is:

In the following equilibrium, which species is the CONJUGATE BASE of compound a?

Which solution will turn litmus paper red?

Which acid will fully ionize in water?

A 25.0-mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH. What is the concentration of HBr in the unknown sample?

Identify the Brønsted acid in this reaction. H₂SO₄ (aq) + HNO₃ (aq)  HSO₄^- (aq) + H₂NO₃⁺ (aq)

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

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Exam 12: Acids Bases

A compound that is a proton (H+) donor is a(n):

Predict the products for HCl (aq) + NaOH (aq) .

An aqueous solution is found to have an H+ concentration of 7.8 × 10-2 M. What is the concentration of OH- in this solution?

In the following equilibrium, which species is the CONJUGATE BASE of compound b?

A compound that increases the concentration of hydroxide ion in an aqueous solution is a(n):

The pH of an unknown solution is 2.1. Its [OH-] is:

Which statement is FALSE?

The net ionic equation for the reaction Cu (s) + 2 HNO3 (aq)  H2(g) + Cu(NO3)2 (aq) is:

Acids that completely ionize in water are:

Which solution will turn litmus paper blue?

The pH of an unknown solution is 8.5. Its [OH-] is:

An aqueous solution is found to have an H+ concentration of 2.0 × 10-4 M. What is the concentration of OH- in this solution?

What is the pH of a solution if [H+] = 1.0 × 10-9 M?

The neutralization reaction of barium hydroxide with aqueous hydrochloric acid (HCl) leads to what two products?

The net ionic equation for the reaction Zn (s) + 2 HNO3 (aq)  H2(g) + Zn(NO3)2 (aq) is:

In the following equilibrium, which species is the CONJUGATE BASE of compound a?

Which solution will turn litmus paper red?

Which acid will fully ionize in water?

A 25.0-mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH. What is the concentration of HBr in the unknown sample?

Identify the Brønsted acid in this reaction. H2SO4 (aq) + HNO3 (aq)  HSO4- (aq) + H2NO3+ (aq)

Foundations

Measurement

Atoms

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

A compound that is a proton (H⁺) donor is a(n):

An aqueous solution is found to have an H⁺ concentration of 7.8 × 10^-² M. What is the concentration of OH^- in this solution?

The pH of an unknown solution is 2.1. Its [OH^-] is:

The net ionic equation for the reaction Cu (s) + 2 HNO₃ (aq)  H₂(g) + Cu(NO₃)₂ (aq) is:

The pH of an unknown solution is 8.5. Its [OH^-] is:

An aqueous solution is found to have an H⁺ concentration of 2.0 × 10^-⁴ M. What is the concentration of OH^- in this solution?

What is the pH of a solution if [H⁺] = 1.0 × 10^-⁹ M?

The net ionic equation for the reaction Zn (s) + 2 HNO₃ (aq)  H₂(g) + Zn(NO₃)₂ (aq) is:

Identify the Brønsted acid in this reaction. H₂SO₄ (aq) + HNO₃ (aq)  HSO₄^- (aq) + H₂NO₃⁺ (aq)