Question 1

In the reaction CaO(s)+ SO2(g)   CaSO3(s),

Accepted Answer

A) O2- acts as a Lewis base, and SO2 acts as a Lewis acid. 
B) Ca2+ acts as a Lewis base, and SO42- acts as a Lewis acid. 
C) SO42- acts as a Lewis base, and SO2 acts as a Lewis acid. 
D) SO2 acts as a Lewis base, and O2- acts as a Lewis acid. 
E) SO2 acts as a Lewis base, and Ca2+ acts as a Lewis acid. 
A) O2- acts as a Lewis base, and SO2 acts as a Lewis acid. 
B) Ca2+ acts as a Lewis base, and SO42- acts as a Lewis acid. 
C) SO42- acts as a Lewis base, and SO2 acts as a Lewis acid. 
D) SO2 acts as a Lewis base, and O2- acts as a Lewis acid. 
E) SO2 acts as a Lewis base, and Ca2+ acts as a Lewis acid.

Question 2

What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3)= 1.8 * 10-5]

Accepted Answer

A) 3.74 
B) 4.98 
C) 6.53 
D) 9.02 
E) 10.25 
A) 3.74 
B) 4.98 
C) 6.53 
D) 9.02 
E) 10.25

Question 3

What mass of potassium hypochlorite must be added to 450.mL of water to give a solution with pH = 10.20? [Ka(HClO)= 4.0 * 10-8]

Accepted Answer

A) 20.g 
B) 0.032 g 
C) 4.1 g 
D) 2.4 g 
E) 9.1 g 
A) 20.g 
B) 0.032 g 
C) 4.1 g 
D) 2.4 g 
E) 9.1 g

Question 4

The pH of coffee is approximately 5.0. How many times greater is the [H+] in coffee than in neutral water?

Accepted Answer

A) 200 
B) 100 
C) 5.0 
D) 1.4 
E) 0.01 
A) 200 
B) 100 
C) 5.0 
D) 1.4 
E) 0.01

Question 5

The compound CH3NH2 reacts with water to form CH3NH3+ and OH-.What role does CH3NH2 play in this reaction?

Accepted Answer

Question 6

What mass of sodium nitrite must be added to 350.mL of water to give a solution with pH = 8.40? [Ka(HNO2)= 5.6 * 10-4]

Accepted Answer

A) 68 g 
B) 1.7 * 10-4 g 
C) 0.039 g 
D) 8.3 g 
E) 24 g 
A) 68 g 
B) 1.7 * 10-4 g 
C) 0.039 g 
D) 8.3 g 
E) 24 g

Question 7

Which is the formula for the hydronium ion?

Accepted Answer

A) OH- 
B) H2O 
C) H3O+ 
D) H3O- 
E) H2O+ 
A) OH- 
B) H2O 
C) H3O+ 
D) H3O- 
E) H2O+

Question 8

Identify the conjugate acid-base pairs in the reaction HSO4- + HF   H2SO4 + F-
 One conjugate acid-base pair is _______________; the other acid-base pair is ______________.

Accepted Answer

Question 9

Which response gives the products of hydrolysis of NH4Cl?

Accepted Answer

A) NH4+ + HCl 
B) NH3 + OH- + HCl 
C) NH3 + H+ 
D) NH4OH + HCl 
E) No hydrolysis occurs. 
A) NH4+ + HCl 
B) NH3 + OH- + HCl 
C) NH3 + H+ 
D) NH4OH + HCl 
E) No hydrolysis occurs.

Question 10

Calculate the pOH of a solution containing 0.25 g of HCl in 800.mL of solution.

Accepted Answer

The answer of Calculate the pOH of a solution containing...

Question 11

Which of these acids is stronger, H3AsO3 or H3AsO4?

Accepted Answer

Question 12

Which solution will have the lowest pH?

Accepted Answer

A) 0.10 M HCN 
B) 0.10 M HNO3 
C) 0.10 M NaCl 
D) 0.10 M H2CO3 
E) 0.10 M NaOH 
A) 0.10 M HCN 
B) 0.10 M HNO3 
C) 0.10 M NaCl 
D) 0.10 M H2CO3 
E) 0.10 M NaOH

Question 13

Consider the weak acid CH3COOH (acetic acid). If a 0.048 M CH3COOH solution is 5.2% ionized, determine the [H3O+] concentration at equilibrium.

Accepted Answer

A) 0.25 M 
B) 9.2 * 10-3 M 
C) 0.048 M 
D) 0.052 M 
E) 2.5 * 10-3 M 
A) 0.25 M 
B) 9.2 * 10-3 M 
C) 0.048 M 
D) 0.052 M 
E) 2.5 * 10-3 M

Question 14

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 15

A 0.14 M HNO2 solution is 5.7% ionized. Calculate the H+ ion concentration.

Accepted Answer

A) 8.0 * 10-3 M 
B) 0.057 M 
C) 0.13 M 
D) 0.14 M 
E) 0.80 M 
A) 8.0 * 10-3 M 
B) 0.057 M 
C) 0.13 M 
D) 0.14 M 
E) 0.80 M

Question 16

In the reaction H2CO3 + H2O    HCO3- + H3O+, the Brønsted acids are

Accepted Answer

A) H2CO3 and H2O. 
B) HCO3- and H2CO3. 
C) H2O and H3O+. 
D) H3O+ and H2CO3. 
E) H2O and HCO3-. 
A) H2CO3 and H2O. 
B) HCO3- and H2CO3. 
C) H2O and H3O+. 
D) H3O+ and H2CO3. 
E) H2O and HCO3-.

Question 17

A 8.0 M solution of formic acid (HCOOH)is 0.47% ionized.What is the Ka of formic acid?

Accepted Answer

1.77 * 10<

Question 18

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 19

Which of these acids is stronger, H2SO4 or HSO4-?

Accepted Answer

Question 20

Calculate the hydrogen ion concentration in a solution of fruit juice having a pH of 4.25.

Accepted Answer

A) 1.0 * 10-14 M 
B) 5.6 * 10-5 M 
C) 4.0 * 10-25 M 
D) 2.5 * 10-4 M 
E) 5.6 * 10-4 M 
A) 1.0 * 10-14 M 
B) 5.6 * 10-5 M 
C) 4.0 * 10-25 M 
D) 2.5 * 10-4 M 
E) 5.6 * 10-4 M

Exam 15: Acids and Bases

In the reaction CaO(s)+ SO2(g) CaSO3(s),

What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3)= 1.8 * 10-5]

What mass of potassium hypochlorite must be added to 450.mL of water to give a solution with pH = 10.20? [Ka(HClO)= 4.0 * 10-8]

The pH of coffee is approximately 5.0. How many times greater is the [H+] in coffee than in neutral water?

The compound CH3NH2 reacts with water to form CH3NH3+ and OH-.What role does CH3NH2 play in this reaction?

What mass of sodium nitrite must be added to 350.mL of water to give a solution with pH = 8.40? [Ka(HNO2)= 5.6 * 10-4]

Which is the formula for the hydronium ion?

Identify the conjugate acid-base pairs in the reaction HSO4- + HF H2SO4 + F- One conjugate acid-base pair is _______________; the other acid-base pair is ______________.

Which response gives the products of hydrolysis of NH4Cl?

Calculate the pOH of a solution containing 0.25 g of HCl in 800.mL of solution.

Which of these acids is stronger, H3AsO3 or H3AsO4?

Which solution will have the lowest pH?

Consider the weak acid CH3COOH (acetic acid). If a 0.048 M CH3COOH solution is 5.2% ionized, determine the [H3O+] concentration at equilibrium.

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

A 0.14 M HNO2 solution is 5.7% ionized. Calculate the H+ ion concentration.

In the reaction H2CO3 + H2O HCO3- + H3O+, the Brønsted acids are

A 8.0 M solution of formic acid (HCOOH)is 0.47% ionized.What is the Ka of formic acid?

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

Which of these acids is stronger, H2SO4 or HSO4-?

Calculate the hydrogen ion concentration in a solution of fruit juice having a pH of 4.25.

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Filters

In the reaction CaO(s)+ SO₂(g) CaSO₃(s),

What is the pH of a 0.20 M solution of NH₄Cl? [K_b(NH₃)= 1.8 * 10^-5]

What mass of potassium hypochlorite must be added to 450.mL of water to give a solution with pH = 10.20? [K_a(HClO)= 4.0 * 10^-8]

The pH of coffee is approximately 5.0. How many times greater is the [H⁺] in coffee than in neutral water?

The compound CH₃NH₂ reacts with water to form CH₃NH₃⁺ and OH^-.What role does CH₃NH₂ play in this reaction?

What mass of sodium nitrite must be added to 350.mL of water to give a solution with pH = 8.40? [K_a(HNO₂)= 5.6 * 10^-4]

Identify the conjugate acid-base pairs in the reaction HSO₄^- + HF H₂SO₄ + F^- One conjugate acid-base pair is _; the other acid-base pair is .

Which response gives the products of hydrolysis of NH₄Cl?

Which of these acids is stronger, H₃AsO₃ or H₃AsO₄?

Consider the weak acid CH₃COOH (acetic acid). If a 0.048 M CH₃COOH solution is 5.2% ionized, determine the [H₃O⁺] concentration at equilibrium.

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

A 0.14 M HNO₂ solution is 5.7% ionized. Calculate the H⁺ ion concentration.

In the reaction H₂CO₃ + H₂O HCO₃^- + H₃O⁺, the Brønsted acids are

A 8.0 M solution of formic acid (HCOOH)is 0.47% ionized.What is the K_a of formic acid?

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

Which of these acids is stronger, H₂SO₄ or HSO₄^-?