Question 1

Which species is the conjugate base of HCN?

Accepted Answer

A) H2CN+ 
B) CN- 
C) H+ 
D) H2O 
A) H2CN+ 
B) CN- 
C) H+ 
D) H2O

Question 2

What is the molarity of an HNO3 solution if 24.1 mL of a 0.250 M Ba(OH)2 solution are needed to titrate a 15.0 mL sample of the acid according to the equation below? Ba(OH)2(aq)+ 2 HNO3(aq)   2 H2O(l)+ Ba(NO3)2(aq)

Accepted Answer

A) 0.402 M HNO3 
B) 0.156 M HNO3 
C) 0.311 M HNO3 
D) 0.201 M HNO3 
E) 0.803 M HNO3 
A) 0.402 M HNO3 
B) 0.156 M HNO3 
C) 0.311 M HNO3 
D) 0.201 M HNO3 
E) 0.803 M HNO3

Question 3

Consider two acids,A and B. If acid A is stronger than acid B,then the conjugate base of B is stronger than the conjugate base of A.

Accepted Answer

A) True 
 B)False

Question 4

Which ion is the strongest base?

Accepted Answer

A) Br- 
B) F- 
C) I- 
D) NO3- 
A) Br- 
B) F- 
C) I- 
D) NO3-

Question 5

A compound that contains both a hydrogen atom and a lone pair of electrons can be either an acid or a base,depending on the particular reaction. Such a compound is said to be ________.

Accepted Answer

The answer of A compound that contains both a hydrogen...

Question 6

What is the correct name of H2SO4?

Accepted Answer

A) Sulfate acid 
B) Hydrogen sulfide acid 
C) Sulfuric acid 
D) Sulfurous acid 
A) Sulfate acid 
B) Hydrogen sulfide acid 
C) Sulfuric acid 
D) Sulfurous acid

Question 7

An aqueous solution with a low pH is necessary for a certain industrial process. Which of the following solutions would have the lowest pH?

Accepted Answer

A) 2.0 M NaOH 
B) 0.5 M HCl 
C) 1.0 M acetic acid,CH3COOH 
D) 0.15 M NaOH 
E) 1.0 M HCl 
A) 2.0 M NaOH 
B) 0.5 M HCl 
C) 1.0 M acetic acid,CH3COOH 
D) 0.15 M NaOH 
E) 1.0 M HCl

Question 8

The value of Kw = 1.0 × 10-14 at all temperatures below 100 °C.

Accepted Answer

A) True 
 B)False

Question 9

Most acids are weak acids.

Accepted Answer

A) True 
 B)False

Question 10

A Brønsted-Lowry acid is ________.

Accepted Answer

A) a compound that contains hydroxide and dissolves in water to form OH- 
B) a compound that is a proton donor 
C) a compound that is a proton acceptor 
D) a compound that contains a hydrogen atom and dissolves in water to form a hydrogen ion,H+ 
A) a compound that contains hydroxide and dissolves in water to form OH- 
B) a compound that is a proton donor 
C) a compound that is a proton acceptor 
D) a compound that contains a hydrogen atom and dissolves in water to form a hydrogen ion,H+

Question 11

Each day,the stomach produces 2.0 L of gastric juice that contains 0.10 M HCl. Phillips Milk of Magnesia is a white-colored,aqueous,mildly alkaline suspension of magnesium hydroxide formulated at 8.0 % (w/v). It would take ________ mL of milk of magnesia to titrate the stomach acid produced in each day. (Mg(OH)2 molar mass = 58.32 g/mol)

Accepted Answer

Question 12

An aqueous solution containing an equal number of moles of Na2HPO4 and H3PO4 is an example of a buffer solution.

Accepted Answer

A) True 
 B)False

Question 13

How many milliliters of 0.653 M NaOH are needed to neutralize 25.0 mL of a 1.02 M HBr solution? The neutralization reaction is: NaOH(aq)+ HBr(aq)→ H2O(l)+ NaBr(aq)

Accepted Answer

A) 16.0 mL NaOH 
B) 25.5 mL NaOH 
C) 39.1 mL NaOH 
D) 16.3 mL NaOH 
A) 16.0 mL NaOH 
B) 25.5 mL NaOH 
C) 39.1 mL NaOH 
D) 16.3 mL NaOH

Question 14

If the pH of blood is lower than 7.35,the blood is more acidic than normal,and the condition is called alkalosis.

Accepted Answer

A) True 
 B)False

Question 15

Which salt forms a solution with a pH < 7 when dissolved in water?

Accepted Answer

A) RbI 
B) NaCH3COO 
C) LiNO2 
D) (NH4)2SO4 
A) RbI 
B) NaCH3COO 
C) LiNO2 
D) (NH4)2SO4

Question 16

In the reaction: SO32-(aq)+ H2O(l)   HSO3-(aq)+ -OH(aq),H2O acts as a Brønsted-Lowry acid.

Accepted Answer

A) True 
 B)False

Question 17

A salt derived from a strong base and a weak acid forms an acidic solution.

Accepted Answer

A) True 
 B)False

Question 18

Which species is the conjugate acid of HPO42-?

Accepted Answer

A) PO43- 
B) P2O 
C) H2PO4- 
D) H2O 
E) OH- 
A) PO43- 
B) P2O 
C) H2PO4- 
D) H2O 
E) OH-

Question 19

A sample of water from the Chesapeake Bay has [H3O+]=3.1 × 10-9 M. Which statement below accurately describes this water sample?

Accepted Answer

A) The pH of the water sample is 7.5. 
B) The water sample is a basic solution. 
C) The water sample doesn't contain any hydroxide ions. 
D) The water sample has a higher concentration of hydronium ions than pure water does. 
A) The pH of the water sample is 7.5. 
B) The water sample is a basic solution. 
C) The water sample doesn't contain any hydroxide ions. 
D) The water sample has a higher concentration of hydronium ions than pure water does.

Question 20

Normal gastric juice has a pH of about 2. Assuming that normal gastric juice is primarily aqueous HCl,what is the concentration of HCl in the stomach?

Accepted Answer

A) 2 M HCl 
B) 1.0 × 102 M HCl 
C) 0.01 M HCl 
D) 0.14 M HCl 
A) 2 M HCl 
B) 1.0 × 102 M HCl 
C) 0.01 M HCl 
D) 0.14 M HCl

Exam 9: Acids and Bases

Which species is the conjugate base of HCN?

What is the molarity of an HNO3 solution if 24.1 mL of a 0.250 M Ba(OH)2 solution are needed to titrate a 15.0 mL sample of the acid according to the equation below? Ba(OH)2(aq)+ 2 HNO3(aq) 2 H2O(l)+ Ba(NO3)2(aq)

Consider two acids,A and B. If acid A is stronger than acid B,then the conjugate base of B is stronger than the conjugate base of A.

Which ion is the strongest base?

A compound that contains both a hydrogen atom and a lone pair of electrons can be either an acid or a base,depending on the particular reaction. Such a compound is said to be ________.

What is the correct name of H2SO4?

An aqueous solution with a low pH is necessary for a certain industrial process. Which of the following solutions would have the lowest pH?

The value of Kw = 1.0 × 10-14 at all temperatures below 100 °C.

Most acids are weak acids.

A Brønsted-Lowry acid is ________.

An aqueous solution containing an equal number of moles of Na2HPO4 and H3PO4 is an example of a buffer solution.

How many milliliters of 0.653 M NaOH are needed to neutralize 25.0 mL of a 1.02 M HBr solution? The neutralization reaction is: NaOH(aq)+ HBr(aq)→ H2O(l)+ NaBr(aq)

If the pH of blood is lower than 7.35,the blood is more acidic than normal,and the condition is called alkalosis.

Which salt forms a solution with a pH < 7 when dissolved in water?

In the reaction: SO32-(aq)+ H2O(l) HSO3-(aq)+ -OH(aq),H2O acts as a Brønsted-Lowry acid.

A salt derived from a strong base and a weak acid forms an acidic solution.

Which species is the conjugate acid of HPO42-?

A sample of water from the Chesapeake Bay has [H3O+]=3.1 × 10-9 M. Which statement below accurately describes this water sample?

Normal gastric juice has a pH of about 2. Assuming that normal gastric juice is primarily aqueous HCl,what is the concentration of HCl in the stomach?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

What is the molarity of an HNO₃ solution if 24.1 mL of a 0.250 M Ba(OH)₂ solution are needed to titrate a 15.0 mL sample of the acid according to the equation below? Ba(OH)₂(aq)+ 2 HNO₃(aq) 2 H₂O(l)+ Ba(NO₃)₂(aq)

What is the correct name of H₂SO₄?

The value of K_w = 1.0 × 10^-14 at all temperatures below 100 °C.

An aqueous solution containing an equal number of moles of Na₂HPO₄ and H₃PO₄ is an example of a buffer solution.

How many milliliters of 0.653 M NaOH are needed to neutralize 25.0 mL of a 1.02 M HBr solution? The neutralization reaction is: NaOH(aq)+ HBr(aq)→ H₂O(l)+ NaBr(aq)

In the reaction: SO₃^2-(aq)+ H₂O(l) HSO₃^-(aq)+ ^-OH(aq),H₂O acts as a Brønsted-Lowry acid.

Which species is the conjugate acid of HPO₄^2-?

A sample of water from the Chesapeake Bay has [H₃O⁺]=3.1 × 10^-9 M. Which statement below accurately describes this water sample?