Question 1

Match the following.
-amphoteric

Accepted Answer

A) the species that results when a base accepts a proton 
B) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
C) a theory that treats acid-base reactions as proton-transfer reactions 
D) a substance which can behave as either an acid or a base 
E) the species that results when an acid donates a proton 
A) the species that results when a base accepts a proton 
B) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
C) a theory that treats acid-base reactions as proton-transfer reactions 
D) a substance which can behave as either an acid or a base 
E) the species that results when an acid donates a proton

Question 2

Which of the following is a weak acid?

Accepted Answer

A) HNO3 
B) H3PO4 
C) NH3 
D) HCl 
E) OH- 
A) HNO3 
B) H3PO4 
C) NH3 
D) HCl 
E) OH-

Question 3

An increase in solution pH corresponds to

Accepted Answer

A) an increase in hydronium ion concentration. 
B) a decrease in hydronium ion concentration. 
C) no change in hydronium ion concentration. 
D) a decrease in hydroxide ion concentration. 
A) an increase in hydronium ion concentration. 
B) a decrease in hydronium ion concentration. 
C) no change in hydronium ion concentration. 
D) a decrease in hydroxide ion concentration.

Question 4

The pH of a 250.mL sample of a buffer solution is 9.85.If 1.0 mL of 6 M HCl is added,the pH of the resulting mixture is closest to

Accepted Answer

A) 0.00. 
B) 1.65. 
C) 7.00. 
D) 9.70. 
E) 10.00. 
A) 0.00. 
B) 1.65. 
C) 7.00. 
D) 9.70. 
E) 10.00.

Question 5

If the concentration of H3O+ in an aqueous solution is 7.6 × 10-9 M,the concentration of OH- is

Accepted Answer

A) 7.6 × 10-23 M. 
B) 1.3 × 10+8 M. 
C) 6.4 × 10-5 M. 
D) 1.3 × 10-6 M. 
E) 7.6 × 10-9 M. 
A) 7.6 × 10-23 M. 
B) 1.3 × 10+8 M. 
C) 6.4 × 10-5 M. 
D) 1.3 × 10-6 M. 
E) 7.6 × 10-9 M.

Question 6

Which reaction best illustrates the behavior of the weak base H2PO4- in aqueous solution?

Accepted Answer

A) H2PO4-(aq)+ H2O(l)  HPO42-(aq)+ H3O+(aq) 
B) H2PO4-(aq)+ H2O(l)  H3PO4(aq)+ OH-(aq) 
C) H2PO4-(aq)  2H+(aq)+ PO43-(aq) 
D) H2PO4-(aq)  H+(aq)+ HPO42-(aq) 
E) H2PO4-(aq)+ H+(aq)  H3PO4(aq) 
A) H2PO4-(aq)+ H2O(l)  HPO42-(aq)+ H3O+(aq) 
B) H2PO4-(aq)+ H2O(l)  H3PO4(aq)+ OH-(aq) 
C) H2PO4-(aq)  2H+(aq)+ PO43-(aq) 
D) H2PO4-(aq)  H+(aq)+ HPO42-(aq) 
E) H2PO4-(aq)+ H+(aq)  H3PO4(aq)

Question 7

Match the following.
-conjugate acid

Accepted Answer

A) the species that results when a base accepts a proton 
B) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
C) a theory that treats acid-base reactions as proton-transfer reactions 
D) a substance which can behave as either an acid or a base 
E) the species that results when an acid donates a proton 
A) the species that results when a base accepts a proton 
B) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
C) a theory that treats acid-base reactions as proton-transfer reactions 
D) a substance which can behave as either an acid or a base 
E) the species that results when an acid donates a proton

Question 8

The pH of a solution with [H3O+] = 5.9 × 10-3 M,to the correct number of significant figures,is

Accepted Answer

A) 5.9 × 10-3. 
B) 2.2. 
C) 2.23. 
D) 1.01. 
E) 2.229. 
A) 5.9 × 10-3. 
B) 2.2. 
C) 2.23. 
D) 1.01. 
E) 2.229.

Question 9

Which one of the following is the weakest acid?

Accepted Answer

A) HCN (Ka = 4.9 × 10-10) 
B) HClO (Ka = 3.0 × 10-8) 
C) HNO2 (Ka = 4.5 × 10-4) 
D) HF (Ka = 6.8 × 10-4) 
A) HCN (Ka = 4.9 × 10-10) 
B) HClO (Ka = 3.0 × 10-8) 
C) HNO2 (Ka = 4.5 × 10-4) 
D) HF (Ka = 6.8 × 10-4)

Question 10

How many mL of 0.100 M NaOH are needed to neutralize 50.00 mL of a 0.150 M solution of CH3CO2H,a monoprotic acid?

Accepted Answer

A) 25.00 mL 
B) 37.50 mL 
C) 50.00 mL 
D) 75.00 mL 
E) 100.00 mL 
A) 25.00 mL 
B) 37.50 mL 
C) 50.00 mL 
D) 75.00 mL 
E) 100.00 mL

Question 11

When acids and bases react the product other than water is a

Accepted Answer

A) hydrogen ion. 
B) hydroxide ion. 
C) hydronium ion. 
D) metal. 
E) salt. 
A) hydrogen ion. 
B) hydroxide ion. 
C) hydronium ion. 
D) metal. 
E) salt.

Question 12

The [OH-] and the pH of 0.035 M KOH at 25°C are,respectively,

Accepted Answer

A) 0.035 M and +1.46. 
B) 0.035 M and -1.46. 
C) 2.9 × 10-13 M and -12.54. 
D) 0.035 and +12.54. 
E) 2.9 × 10-13 M and +12.54. 
A) 0.035 M and +1.46. 
B) 0.035 M and -1.46. 
C) 2.9 × 10-13 M and -12.54. 
D) 0.035 and +12.54. 
E) 2.9 × 10-13 M and +12.54.

Question 13

Which substance produces carbon dioxide and water upon reaction with an acid?

Accepted Answer

A) NaCH3CO2 
B) NH4NO3 
C) MgCO3 
D) H2C2O4 
E) C8H18 
A) NaCH3CO2 
B) NH4NO3 
C) MgCO3 
D) H2C2O4 
E) C8H18

Question 14

Which of the following compounds is a salt?

Accepted Answer

A) HBr 
B) KNO3 
C) H2SO4 
D) NaOH 
E) C6H12O6 
A) HBr 
B) KNO3 
C) H2SO4 
D) NaOH 
E) C6H12O6

Question 15

The pH of a cup of coffee is measured as 5.45.Express this measurement as [H+],using the correct number of significant figures.

Accepted Answer

A) 3.548 × 10-6 M 
B) 3.55 × 10-6 M 
C) 3.6 × 10-6 M 
D) 4 × 10-6 M 
E) 2.82 × 105 M 
A) 3.548 × 10-6 M 
B) 3.55 × 10-6 M 
C) 3.6 × 10-6 M 
D) 4 × 10-6 M 
E) 2.82 × 105 M

Question 16

Which of the following pH's corresponds to a neutral solution?

Accepted Answer

A) 7.0 
B) 1.8 
C) 6.2 
D) 8.5 
E) 14.0 
A) 7.0 
B) 1.8 
C) 6.2 
D) 8.5 
E) 14.0

Question 17

How many mL of 0.360 M HNO3 are needed to neutralize a 22.5 mL sample of 0.240 M KOH?

Accepted Answer

A) 5.40 mL 
B) 15.0 mL 
C) 22.5 mL 
D) 33.8 mL 
E) 62.5 mL 
A) 5.40 mL 
B) 15.0 mL 
C) 22.5 mL 
D) 33.8 mL 
E) 62.5 mL

Question 18

Write a balanced equation for the transfer of a proton between the bicarbonate ion and the hydronium ion.Identify the conjugate acid-base pairs and determine which side of the reaction is favored.

Accepted Answer

HCO₃^-(aq) + H₃O⁺(aq) @#IMG-DLM& H₂CO₃(aq) + H

Question 19

A Brønsted-Lowry acid is a substance which

Accepted Answer

A) produces hydrogen ions in aqueous solution. 
B) produces hydroxide ions in aqueous solution. 
C) donates protons to other substances. 
D) accepts protons from other substances. 
E) accepts hydronium ions from other substances. 
A) produces hydrogen ions in aqueous solution. 
B) produces hydroxide ions in aqueous solution. 
C) donates protons to other substances. 
D) accepts protons from other substances. 
E) accepts hydronium ions from other substances.

Question 20

All of the statements regarding equivalents of acids and bases are true except

Accepted Answer

A) equivalents are the same as moles. 
B) equivalents of acid are based on the number of hydrogen ions produced per formula unit of acid. 
C) equivalents are used to determine normality of solutions. 
D) the equivalent weight of a base is the weight that produces one mole of hydroxide ions. 
E) one equivalent of any acid will neutralize one equivalent of any base. 
A) equivalents are the same as moles. 
B) equivalents of acid are based on the number of hydrogen ions produced per formula unit of acid. 
C) equivalents are used to determine normality of solutions. 
D) the equivalent weight of a base is the weight that produces one mole of hydroxide ions. 
E) one equivalent of any acid will neutralize one equivalent of any base.

Exam 10: Acids and Bases

Match the following. -amphoteric

Which of the following is a weak acid?

An increase in solution pH corresponds to

The pH of a 250.mL sample of a buffer solution is 9.85.If 1.0 mL of 6 M HCl is added,the pH of the resulting mixture is closest to

If the concentration of H3O+ in an aqueous solution is 7.6 × 10-9 M,the concentration of OH- is

Which reaction best illustrates the behavior of the weak base H2PO4- in aqueous solution?

Match the following. -conjugate acid

The pH of a solution with [H3O+] = 5.9 × 10-3 M,to the correct number of significant figures,is

Which one of the following is the weakest acid?

How many mL of 0.100 M NaOH are needed to neutralize 50.00 mL of a 0.150 M solution of CH3CO2H,a monoprotic acid?

When acids and bases react the product other than water is a

The [OH-] and the pH of 0.035 M KOH at 25°C are,respectively,

Which substance produces carbon dioxide and water upon reaction with an acid?

Which of the following compounds is a salt?

The pH of a cup of coffee is measured as 5.45.Express this measurement as [H+],using the correct number of significant figures.

Which of the following pH's corresponds to a neutral solution?

How many mL of 0.360 M HNO3 are needed to neutralize a 22.5 mL sample of 0.240 M KOH?

Write a balanced equation for the transfer of a proton between the bicarbonate ion and the hydronium ion.Identify the conjugate acid-base pairs and determine which side of the reaction is favored.

A Brønsted-Lowry acid is a substance which

All of the statements regarding equivalents of acids and bases are true except

Matter and Measurements

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Filters

If the concentration of H₃O⁺ in an aqueous solution is 7.6 × 10^-9 M,the concentration of OH^- is

Which reaction best illustrates the behavior of the weak base H₂PO₄^- in aqueous solution?

The pH of a solution with [H₃O⁺] = 5.9 × 10^-3 M,to the correct number of significant figures,is

How many mL of 0.100 M NaOH are needed to neutralize 50.00 mL of a 0.150 M solution of CH₃CO₂H,a monoprotic acid?

The [OH^-] and the pH of 0.035 M KOH at 25°C are,respectively,

The pH of a cup of coffee is measured as 5.45.Express this measurement as [H⁺],using the correct number of significant figures.

How many mL of 0.360 M HNO₃ are needed to neutralize a 22.5 mL sample of 0.240 M KOH?