Question 1

The pOH of a solution is 9.60. Calculate the hydrogen ion concentration in this solution.

Accepted Answer

A) 2.5 * 10-10 M 
B) 6.0 * 10-9 M 
C) 4.0 * 10-5 M 
D) 2.4 * 10-4 M 
E) 1.0 * 10-14 M 
A) 2.5 * 10-10 M 
B) 6.0 * 10-9 M 
C) 4.0 * 10-5 M 
D) 2.4 * 10-4 M 
E) 1.0 * 10-14 M

Question 2

The OH- concentration in a 1.0 * 10-3 M Ba(OH)2 solution is

Accepted Answer

A) 0.50 * 10-3 M. 
B) 1.0 * 10-3 M. 
C) 2.0 * 10-3 M. 
D) 1.0 * 10-2 M. 
E) 0.020 M. 
A) 0.50 * 10-3 M. 
B) 1.0 * 10-3 M. 
C) 2.0 * 10-3 M. 
D) 1.0 * 10-2 M. 
E) 0.020 M.

Question 3

If the pH of seawater is 8.0, what is the hydroxide ion concentration in seawater?

Accepted Answer

1 * 10<sup

Question 4

The OH- concentration in a 7.5 * 10-3 M Ca(OH)2 solution is

Accepted Answer

A) 7.5 * 10-3 M. 
B) 1.5 * 10-2 M. 
C) 1.3 * 10-12 M. 
D) 1.0 * 10-7 M. 
E) 1.0 * 10-14 M. 
A) 7.5 * 10-3 M. 
B) 1.5 * 10-2 M. 
C) 1.3 * 10-12 M. 
D) 1.0 * 10-7 M. 
E) 1.0 * 10-14 M.

Question 5

What mass of sodium cyanide must be added to 250. mL of water in order to obtain a solution having a pH of 10.50? [Ka(HCN)= 4.9 * 10-10]

Accepted Answer

A) 240 g 
B) 0.032 g 
C) 0.059 g 
D) 0.94 g 
E) 0.24 g 
A) 240 g 
B) 0.032 g 
C) 0.059 g 
D) 0.94 g 
E) 0.24 g

Question 6

What mass of sodium formate (HCOONa)must be added to 350. mL of water in order to obtain a solution having a pH of 8.50? [Ka(HCOOH)= 1.77 * 10-4]

Accepted Answer

A) 0.23 g 
B) 4.3 g 
C) 35 g 
D) 12 g 
E) 130 g 
A) 0.23 g 
B) 4.3 g 
C) 35 g 
D) 12 g 
E) 130 g

Question 7

For maleic acid, HOOCCH=CHCOOH, Ka1 = 1.42 * 10-2 and Ka2 = 8.57 * 10-7. What is the concentration of maleate ion (-OOCCH=CHCOO-)in a 0.150 M aqueous solution of maleic acid?

Accepted Answer

A) 8.57 * 10-7 M 
B) 2.79 * 10-6 M 
C) 1.86 * 10-5 M 
D) 4.60 * 10-2 M 
E) 1.19 * 10-1 M 
A) 8.57 * 10-7 M 
B) 2.79 * 10-6 M 
C) 1.86 * 10-5 M 
D) 4.60 * 10-2 M 
E) 1.19 * 10-1 M

Question 8

If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H+] in the rain than in a cup of coffee having a pH of 5.0?

Accepted Answer

A) 1000 
B) 100 
C) 20 
D) 1.7 
E) 0.60 
A) 1000 
B) 100 
C) 20 
D) 1.7 
E) 0.60

Question 9

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

Accepted Answer

The hydronium ion concentratio

Question 10

Which of these acids is the strongest?

Accepted Answer

A) H2SO3 
B) H2SeO3 
C) H2TeO3 
A) H2SO3 
B) H2SeO3 
C) H2TeO3

Question 11

Which is not a characteristic property of acids?

Accepted Answer

A) neutralizes bases 
B) turns litmus from blue to red 
C) reacts with active metals to produce H2(g) 
D) reacts with CO2(g)to form carbonates 
E) All of the above are characteristic properties of acids. 
A) neutralizes bases 
B) turns litmus from blue to red 
C) reacts with active metals to produce H2(g) 
D) reacts with CO2(g)to form carbonates 
E) All of the above are characteristic properties of acids.

Question 12

When comparing acid strength of binary acids HX, as X varies within a particular group of the periodic table, which one of these factors dominates in affecting the acid strength?

Accepted Answer

A) bond strength 
B) electron withdrawing effects 
C) percent ionic character of the H-X bond 
D) solubility 
E) Le Chátelier's principle 
A) bond strength 
B) electron withdrawing effects 
C) percent ionic character of the H-X bond 
D) solubility 
E) Le Chátelier's principle

Question 13

Which one of these salts will form a basic solution upon dissolving in water?

Accepted Answer

A) NaCl 
B) NaNO2 
C) NH4NO3 
D) KBr 
E) AlCl3 
A) NaCl 
B) NaNO2 
C) NH4NO3 
D) KBr 
E) AlCl3

Question 14

In the reaction HSO4-(aq)+ OH-(aq)$\rarr$SO42-(aq)+ H2O(l), the conjugate acid-base pairs are pair 1 pair 2

Accepted Answer

A) HSO4- and SO42-; H2O and OH-. 
B) HSO4- and H3O+; SO42 - and OH-. 
C) HSO4- and OH-; SO42 - and H2O. 
D) HSO4- and H2O; OH - and SO42-. 
E) HSO4- and OH-; SO42 - and H3O+. 
A) HSO4- and SO42-; H2O and OH-. 
B) HSO4- and H3O+; SO42 - and OH-. 
C) HSO4- and OH-; SO42 - and H2O. 
D) HSO4- and H2O; OH - and SO42-. 
E) HSO4- and OH-; SO42 - and H3O+.

Question 15

What is the pH of a solution prepared by mixing 10.0 mL of a strong acid solution with pH = 2.00 and 10.0 mL of a strong acid solution with pH = 6.00?

Accepted Answer

A) 2.0 
B) 2.3 
C) 4.0 
D) 6.0 
E) 8.0 
A) 2.0 
B) 2.3 
C) 4.0 
D) 6.0 
E) 8.0

Question 16

Diet cola drinks have a pH of about 3.0, while milk has a pH of about 7.0. How many times greater is the H3O+ concentration in diet cola than in milk?

Accepted Answer

A) 2.3 times higher in diet cola than in milk 
B) 400 times higher in diet cola than in milk 
C) 0.43 times higher in diet cola than in milk 
D) 1,000 times higher in diet cola than in milk 
E) 10,000 times higher in diet cola than in milk 
A) 2.3 times higher in diet cola than in milk 
B) 400 times higher in diet cola than in milk 
C) 0.43 times higher in diet cola than in milk 
D) 1,000 times higher in diet cola than in milk 
E) 10,000 times higher in diet cola than in milk

Question 17

If the pH of liquid bleach is 12.0, what is the hydroxide ion concentration in this solution?

Accepted Answer

1 * 10<sup

Question 18

P4O10 is classified as an acidic oxide because it

Accepted Answer

A) reacts with acids to produce a salt. 
B) is insoluble in water. 
C) reacts with water to produce OH-. 
D) gives a solution of phosphoric acid, H3PO4, on dissolving in water. 
E) can act as a Lewis base by donating electron pairs. 
A) reacts with acids to produce a salt. 
B) is insoluble in water. 
C) reacts with water to produce OH-. 
D) gives a solution of phosphoric acid, H3PO4, on dissolving in water. 
E) can act as a Lewis base by donating electron pairs.

Question 19

Write the chemical formula for the acid formed when Cl2O7 is dissolved in water.

Accepted Answer

Question 20

The pH of coffee is approximately 5.0. How many times greater is the [H3O+] in coffee than in tap water having a pH of 8.0?

Accepted Answer

A) 0.62 
B) 1.6 
C) 30 
D) 1,000 
E) 1.0 * 104 
A) 0.62 
B) 1.6 
C) 30 
D) 1,000 
E) 1.0 * 104

Exam 16: Acids and Bases

The pOH of a solution is 9.60. Calculate the hydrogen ion concentration in this solution.

The OH- concentration in a 1.0 * 10-3 M Ba(OH)2 solution is

If the pH of seawater is 8.0, what is the hydroxide ion concentration in seawater?

The OH- concentration in a 7.5 * 10-3 M Ca(OH)2 solution is

What mass of sodium cyanide must be added to 250. mL of water in order to obtain a solution having a pH of 10.50? [Ka(HCN)= 4.9 * 10-10]

What mass of sodium formate (HCOONa)must be added to 350. mL of water in order to obtain a solution having a pH of 8.50? [Ka(HCOOH)= 1.77 * 10-4]

For maleic acid, HOOCCH=CHCOOH, Ka1 = 1.42 * 10-2 and Ka2 = 8.57 * 10-7. What is the concentration of maleate ion (-OOCCH=CHCOO-)in a 0.150 M aqueous solution of maleic acid?

If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H+] in the rain than in a cup of coffee having a pH of 5.0?

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

Which of these acids is the strongest?

Which is not a characteristic property of acids?

When comparing acid strength of binary acids HX, as X varies within a particular group of the periodic table, which one of these factors dominates in affecting the acid strength?

Which one of these salts will form a basic solution upon dissolving in water?

In the reaction HSO4-(aq)+ OH-(aq) →\rarr→ SO42-(aq)+ H2O(l), the conjugate acid-base pairs are pair 1 pair 2

What is the pH of a solution prepared by mixing 10.0 mL of a strong acid solution with pH = 2.00 and 10.0 mL of a strong acid solution with pH = 6.00?

Diet cola drinks have a pH of about 3.0, while milk has a pH of about 7.0. How many times greater is the H3O+ concentration in diet cola than in milk?

If the pH of liquid bleach is 12.0, what is the hydroxide ion concentration in this solution?

P4O10 is classified as an acidic oxide because it

Write the chemical formula for the acid formed when Cl2O7 is dissolved in water.

The pH of coffee is approximately 5.0. How many times greater is the [H3O+] in coffee than in tap water having a pH of 8.0?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

The OH^- concentration in a 1.0 * 10^-3 M Ba(OH)₂ solution is

The OH^- concentration in a 7.5 * 10^-3 M Ca(OH)₂ solution is

What mass of sodium cyanide must be added to 250. mL of water in order to obtain a solution having a pH of 10.50? [K_a(HCN)= 4.9 * 10^-10]

What mass of sodium formate (HCOONa)must be added to 350. mL of water in order to obtain a solution having a pH of 8.50? [K_a(HCOOH)= 1.77 * 10^-4]

For maleic acid, HOOCCH=CHCOOH, K_a1 = 1.42 * 10^-2 and K_a2 = 8.57 * 10^-7. What is the concentration of maleate ion (^-OOCCH=CHCOO^-)in a 0.150 M aqueous solution of maleic acid?

If the pH of an acid rain storm is approximately 3.0, how many times greater is the [H⁺] in the rain than in a cup of coffee having a pH of 5.0?

In the reaction HSO₄^-(aq)+ OH^-(aq) $\rarr$ SO₄^2-(aq)+ H₂O(l), the conjugate acid-base pairs are pair 1 pair 2

Diet cola drinks have a pH of about 3.0, while milk has a pH of about 7.0. How many times greater is the H₃O⁺ concentration in diet cola than in milk?

P₄O₁₀ is classified as an acidic oxide because it

Write the chemical formula for the acid formed when Cl₂O₇ is dissolved in water.

The pH of coffee is approximately 5.0. How many times greater is the [H₃O⁺] in coffee than in tap water having a pH of 8.0?