Question 1

The pH of a sample of water from a river is 6.0. A sample of effluent from a food processing plant has a pH of 4.0. The concentration of hydronium ion in the effluent is

Accepted Answer

A)  one and a half times (1.5x) larger than the river hydronium ion concentration. 
B)  two times (2x) larger than the river hydronium ion concentration. 
C)  four times (4x) larger than the river hydronium ion concentration. 
D)  100 times (100x) larger than the river hydronium ion concentration. 
A)  one and a half times (1.5x) larger than the river hydronium ion concentration. 
B)  two times (2x) larger than the river hydronium ion concentration. 
C)  four times (4x) larger than the river hydronium ion concentration. 
D)  100 times (100x) larger than the river hydronium ion concentration.

Question 2

In the balanced chemical reaction for the neutralization of sodium hydroxide with sulfuric acid, H2SO4, the coefficient of water is

Accepted Answer

A)  2. 
B)  1. 
C)  3. 
D)  4. 
A)  2. 
B)  1. 
C)  3. 
D)  4.

Question 3

Most of the sulfuric acid produced in this country is used for

Accepted Answer

A)  cleaning products. 
B)  manufacturing mortar and cement. 
C)  manufacturing fertilizer. 
D)  sweetening acidic soil. 
A)  cleaning products. 
B)  manufacturing mortar and cement. 
C)  manufacturing fertilizer. 
D)  sweetening acidic soil.

Question 4

When an aqueous solution containing hydrochloric acid is just neutralized with an aqueous solution containing sodium hydroxide, the solution would taste

Accepted Answer

A)  sour. 
B)  bitter. 
C)  salty. 
D)  sweet. 
A)  sour. 
B)  bitter. 
C)  salty. 
D)  sweet.

Question 5

A weak acid will always be less concentrated than a strong acid.

Accepted Answer

A) True 
 B)False

Question 6

When added to water, which of the following would produce a base?

Accepted Answer

A)  Li2O 
B)  ClO2 
C)  P4O10 
D)  SO2 
A)  Li2O 
B)  ClO2 
C)  P4O10 
D)  SO2

Question 7

When an acid and a base react in a neutralization reaction, the products will be acidic.

Accepted Answer

A) True 
 B)False

Question 8

An unknown substance is added to a solution and the pH decreases. The substance is best described as a(n)

Accepted Answer

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

Question 9

Which antacid also acts as an antidiarrheal agent?

Accepted Answer

A)  lithium hydroxide 
B)  nitric acid 
C)  lithium bicarbonate 
D)  calcium carbonate 
A)  lithium hydroxide 
B)  nitric acid 
C)  lithium bicarbonate 
D)  calcium carbonate

Question 10

Which is a weak base in aqueous solution?

Accepted Answer

A)  NH3 
B)  HF 
C)  NaOH 
D)  Ca(OH)2 
A)  NH3 
B)  HF 
C)  NaOH 
D)  Ca(OH)2

Question 11

All antacids are

Accepted Answer

A)  acids. 
B)  bases. 
C)  neutral. 
D)  salts. 
A)  acids. 
B)  bases. 
C)  neutral. 
D)  salts.

Question 12

When added to water, which of the following would NOT produce a base?

Accepted Answer

A)  BaO 
B)  K2O 
C)  Na2O 
D)  CO2 
A)  BaO 
B)  K2O 
C)  Na2O 
D)  CO2

Question 13

The pH = -log[H+] for a solution. The pOH = -log[OH-] for a solution. The pH and pOH are related, and their sum is equal to 14 (pH + pOH = 14). If a solution has a pH of 6, what is the pOH?

Accepted Answer

A)  6 
B)  7 
C)  8 
D)  14 
A)  6 
B)  7 
C)  8 
D)  14

Question 14

Which of the following is/are characteristic(s) of acids?

Accepted Answer

A)  taste sour 
B)  turn litmus red 
C)  react with bases to form salts 
D)  All are characteristics of acids. 
A)  taste sour 
B)  turn litmus red 
C)  react with bases to form salts 
D)  All are characteristics of acids.

Question 15

A common name for hydrochloric acid is

Accepted Answer

A)  lye. 
B)  muriatic acid. 
C)  lime. 
D)  ammonia. 
A)  lye. 
B)  muriatic acid. 
C)  lime. 
D)  ammonia.

Question 16

Hydrocyanic acid is classified as a weak acid in water. This means that it produces

Accepted Answer

A)  no hydronium ions. 
B)  a relatively small fraction of the maximum number of possible hydronium ions. 
C)  a relatively large fraction of the maximum number of possible hydronium ions. 
D)  100% of the maximum number of possible hydronium ions. 
A)  no hydronium ions. 
B)  a relatively small fraction of the maximum number of possible hydronium ions. 
C)  a relatively large fraction of the maximum number of possible hydronium ions. 
D)  100% of the maximum number of possible hydronium ions.

Question 17

A sample of rainwater has a pH of 3.5. What ion is sure to be present in relatively large concentration in this rain sample?

Accepted Answer

A)  H3O+ 
B)  SO42- 
C)  OH- 
D)  HSO4- 
A)  H3O+ 
B)  SO42- 
C)  OH- 
D)  HSO4-

Question 18

Which of the following is NOT true of the Arrhenius theory?

Accepted Answer

A)  Acids are defined as compounds that produce H+ ions in water solution. 
B)  Bases are defined as compounds that produce OH- ions in water solution. 
C)  Arrhenius theory only applies to reactions in aqueous solution. 
D)  Acids are defined as compounds that produce OH- ions in water solution. 
A)  Acids are defined as compounds that produce H+ ions in water solution. 
B)  Bases are defined as compounds that produce OH- ions in water solution. 
C)  Arrhenius theory only applies to reactions in aqueous solution. 
D)  Acids are defined as compounds that produce OH- ions in water solution.

Question 19

Rainwater has a pH below 7 because raindrops absorb CO2 which can react with water to form carbonic acid.

Accepted Answer

A) True 
 B)False

Question 20

All of the following are strong acids EXCEPT

Accepted Answer

A)  hydrochloric acid. 
B)  perchloric acid. 
C)  hydroiodic acid. 
D)  hydrocyanic acid. 
A)  hydrochloric acid. 
B)  perchloric acid. 
C)  hydroiodic acid. 
D)  hydrocyanic acid.

Exam 7: Acids and Bases

The pH of a sample of water from a river is 6.0. A sample of effluent from a food processing plant has a pH of 4.0. The concentration of hydronium ion in the effluent is

In the balanced chemical reaction for the neutralization of sodium hydroxide with sulfuric acid, H2SO4, the coefficient of water is

Most of the sulfuric acid produced in this country is used for

When an aqueous solution containing hydrochloric acid is just neutralized with an aqueous solution containing sodium hydroxide, the solution would taste

A weak acid will always be less concentrated than a strong acid.

When added to water, which of the following would produce a base?

When an acid and a base react in a neutralization reaction, the products will be acidic.

An unknown substance is added to a solution and the pH decreases. The substance is best described as a(n)

Which antacid also acts as an antidiarrheal agent?

Which is a weak base in aqueous solution?

All antacids are

When added to water, which of the following would NOT produce a base?

The pH = -log[H+] for a solution. The pOH = -log[OH-] for a solution. The pH and pOH are related, and their sum is equal to 14 (pH + pOH = 14). If a solution has a pH of 6, what is the pOH?

Which of the following is/are characteristic(s) of acids?

A common name for hydrochloric acid is

Hydrocyanic acid is classified as a weak acid in water. This means that it produces

A sample of rainwater has a pH of 3.5. What ion is sure to be present in relatively large concentration in this rain sample?

Which of the following is NOT true of the Arrhenius theory?

Rainwater has a pH below 7 because raindrops absorb CO2 which can react with water to form carbonic acid.

All of the following are strong acids EXCEPT

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In the balanced chemical reaction for the neutralization of sodium hydroxide with sulfuric acid, H₂SO₄, the coefficient of water is

The pH = -log[H⁺] for a solution. The pOH = -log[OH^-] for a solution. The pH and pOH are related, and their sum is equal to 14 (pH + pOH = 14). If a solution has a pH of 6, what is the pOH?

Rainwater has a pH below 7 because raindrops absorb CO₂ which can react with water to form carbonic acid.