Question 1

Which one of the following salts,when dissolved in water,produces the solution with the highest pH?

Accepted Answer

A) LiI 
B) LiBr 
C) LiCl 
D) LiF 
A) LiI 
B) LiBr 
C) LiCl 
D) LiF

Question 2

The following pictures represent equal volumes of aqueous solutions of three acids HA (A = X,Y,or Z);water molecules have been omitted for clarity.  
-Arrange the acids in order of increasing acid strength.

Accepted Answer

A) HZ < HY < HX 
B) HY < HZ < HX 
C) HZ < HX < HY 
D) HX < HZ < HY 
A) HZ < HY < HX 
B) HY < HZ < HX 
C) HZ < HX < HY 
D) HX < HZ < HY

Question 3

What is the pH of a solution prepared by dissolving 0.15 gram of solid CaO (lime)in enough water to make 2.00 L of aqueous Ca(OH)2 (limewater)? CaO(s)+ H2O(l)→ Ca2+(aq)+ 2 OH-(aq)

Accepted Answer

A) 2.57 
B) 2.87 
C) 11.13 
D) 11.43 
A) 2.57 
B) 2.87 
C) 11.13 
D) 11.43

Question 4

What is the pH of a 0.040 M HClO4 solution?

Accepted Answer

A) 0.040 
B) 0.080 
C) 1.40 
D) 12.60 
A) 0.040 
B) 0.080 
C) 1.40 
D) 12.60

Question 5

Calculate the concentration of bicarbonate ion,HCO3-,in a 0.010 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

Accepted Answer

A) 6.6 × 10-5 M 
B) 4.3 × 10-7 M 
C) 4.3 × 10-9 M 
D) 5.6 × 10-11 M 
A) 6.6 × 10-5 M 
B) 4.3 × 10-7 M 
C) 4.3 × 10-9 M 
D) 5.6 × 10-11 M

Question 6

A 1.25 × 10-4 M solution of the anti-inflammatory drug naproxen has a pH = 4.2.The Ka and pKa of naproxen are ________ and ________.

Accepted Answer

Question 7

A weak base ionizes in water as follows: B(aq) + H2O(l) ⇌ BH+(aq)+ OH-(aq)
A 0.150 M solution of B is 2.500 % ionized at 25ºC.What is the pH of this solution?

Accepted Answer

A) 0.40 
B) 2.43 
C) 11.57 
D) 13.60 
A) 0.40 
B) 2.43 
C) 11.57 
D) 13.60

Question 8

What is the identity of M in the hydrate M(H2O)6n+ that has the 0.10 M solution with the highest pH?

Accepted Answer

A) Li+ 
B) Na+ 
C) Mg2+ 
D) Al3+ 
A) Li+ 
B) Na+ 
C) Mg2+ 
D) Al3+

Question 9

What is the strongest Br∅nsted-Lowry acid in the chemical reaction shown below? 2 HNO3(aq)+ Ba(OH)2(aq)→ Ba(NO3)2(aq)+ 2 H2O(l)

Accepted Answer

A) HNO3 
B) Ba(OH)2 
C) Ba(NO3)2 
D) H2O 
A) HNO3 
B) Ba(OH)2 
C) Ba(NO3)2 
D) H2O

Question 10

From the following chemical reactions determine the relative Br∅nsted-Lowry acid strengths (strongest to weakest). HCl(aq)+ H2O(l)→ H3O+(aq)+ Cl-(aq)
HCN(aq)+ H2O(l)⇌ H3O+(aq)+ CN-(aq)

Accepted Answer

A) HCl > HCN > H3O+ 
B) HCl > H3O+ > HCN 
C) H3O+ > HCl > HCN 
D) HCN > H3O+ > HCl 
A) HCl > HCN > H3O+ 
B) HCl > H3O+ > HCN 
C) H3O+ > HCl > HCN 
D) HCN > H3O+ > HCl

Question 11

-Which of the above pictures represents a solution of a diprotic acid H2A for which Ka1 = ∞ and Ka2 is exceptionally small.(Water molecules have been omitted for clarity. )

Accepted Answer

A) picture (a) 
B) picture (b) 
C) picture (c) 
D) picture (d) 
A) picture (a) 
B) picture (b) 
C) picture (c) 
D) picture (d)

Question 12

Which one of the following is expected to be the strongest Lewis acid?

Accepted Answer

A) Fe 
B) Fe+ 
C) Fe2+ 
D) Fe3+ 
A) Fe 
B) Fe+ 
C) Fe2+ 
D) Fe3+

Question 13

The pH of 0.150 M CH3CO2H,acetic acid,is 2.78.What is the value of Ka for acetic acid?

Accepted Answer

A) 2.8 × 10-6 
B) 1.9 × 10-5 
C) 1.7 × 10-3 
D) 1.1 × 10-2 
A) 2.8 × 10-6 
B) 1.9 × 10-5 
C) 1.7 × 10-3 
D) 1.1 × 10-2

Question 14

Using the conjugate acid-base pairs listed below,complete the following equation with the pair that gives an equilibrium constant Kc > 1. ________ + H2CO3 ⇌ ________ + HCO3-

Accepted Answer

A) HF/F- 
B) HCl/Cl- 
C) HOCl/OCl- 
D) HSO42-/SO42- 
A) HF/F- 
B) HCl/Cl- 
C) HOCl/OCl- 
D) HSO42-/SO42-

Question 15

Arrange the acids in order of increasing acid strength.

Accepted Answer

A) D < C < A < B 
B) D < C < B < A 
C) D < B < A < C 
D) D < A < C < B 
A) D < C < A < B 
B) D < C < B < A 
C) D < B < A < C 
D) D < A < C < B

Question 16

Calculate the pH of a 0.060 M carbonic acid solution,H2CO3(aq),that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

Accepted Answer

A) 1.22 
B) 3.79 
C) 6.37 
D) 10.25 
A) 1.22 
B) 3.79 
C) 6.37 
D) 10.25

Question 17

At 25°C,the pH of a vinegar solution is 2.60.What are the values of [H3O+] and [OH-] in the solution?

Accepted Answer

A) 3.99 × 10-12 M,2.51 × 10-3 M 
B) 2.51 × 10-3 M,3.98 × 10-12 M 
C) 2.51 × 10-3 M,11.40 M 
D) 2.60 M,11.40 M 
A) 3.99 × 10-12 M,2.51 × 10-3 M 
B) 2.51 × 10-3 M,3.98 × 10-12 M 
C) 2.51 × 10-3 M,11.40 M 
D) 2.60 M,11.40 M

Question 18

What is the pH of a 0.020 M Ba(OH)2 solution?

Accepted Answer

A) 1.40 
B) 1.70 
C) 12.30 
D) 12.60 
A) 1.40 
B) 1.70 
C) 12.30 
D) 12.60

Question 19

Which acid of the following set has the strongest conjugate base?

Accepted Answer

A) CH4   
B) NH3 
C) H2S 
D) HCl 
A) CH4   
B) NH3 
C) H2S 
D) HCl

Question 20

Which Br∅nsted-Lowry acid is not considered to be a strong acid in water?

Accepted Answer

A) HCl 
B) HI  
C) H ClO3 
D) H2SO4 
A) HCl 
B) HI  
C) H ClO3 
D) H2SO4

Exam 15: Aqueous Equilibria: Acids and Bases

Which one of the following salts,when dissolved in water,produces the solution with the highest pH?

The following pictures represent equal volumes of aqueous solutions of three acids HA (A = X,Y,or Z);water molecules have been omitted for clarity. -Arrange the acids in order of increasing acid strength.

What is the pH of a solution prepared by dissolving 0.15 gram of solid CaO (lime)in enough water to make 2.00 L of aqueous Ca(OH)2 (limewater)? CaO(s)+ H2O(l)→ Ca2+(aq)+ 2 OH-(aq)

What is the pH of a 0.040 M HClO4 solution?

Calculate the concentration of bicarbonate ion,HCO3-,in a 0.010 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

A 1.25 × 10-4 M solution of the anti-inflammatory drug naproxen has a pH = 4.2.The Ka and pKa of naproxen are ________ and ________.

A weak base ionizes in water as follows: B(aq) + H2O(l) ⇌ BH+(aq)+ OH-(aq) A 0.150 M solution of B is 2.500 % ionized at 25ºC.What is the pH of this solution?

What is the identity of M in the hydrate M(H2O)6n+ that has the 0.10 M solution with the highest pH?

What is the strongest Br∅nsted-Lowry acid in the chemical reaction shown below? 2 HNO3(aq)+ Ba(OH)2(aq)→ Ba(NO3)2(aq)+ 2 H2O(l)

From the following chemical reactions determine the relative Br∅nsted-Lowry acid strengths (strongest to weakest). HCl(aq)+ H2O(l)→ H3O+(aq)+ Cl-(aq) HCN(aq)+ H2O(l)⇌ H3O+(aq)+ CN-(aq)

-Which of the above pictures represents a solution of a diprotic acid H2A for which Ka1 = ∞ and Ka2 is exceptionally small.(Water molecules have been omitted for clarity. )

Which one of the following is expected to be the strongest Lewis acid?

The pH of 0.150 M CH3CO2H,acetic acid,is 2.78.What is the value of Ka for acetic acid?

Using the conjugate acid-base pairs listed below,complete the following equation with the pair that gives an equilibrium constant Kc > 1. ________ + H2CO3 ⇌ ________ + HCO3-

Arrange the acids in order of increasing acid strength.

Calculate the pH of a 0.060 M carbonic acid solution,H2CO3(aq),that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.

At 25°C,the pH of a vinegar solution is 2.60.What are the values of [H3O+] and [OH-] in the solution?

What is the pH of a 0.020 M Ba(OH)2 solution?

Which acid of the following set has the strongest conjugate base?

Which Br∅nsted-Lowry acid is not considered to be a strong acid in water?

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What is the pH of a solution prepared by dissolving 0.15 gram of solid CaO (lime)in enough water to make 2.00 L of aqueous Ca(OH)₂ (limewater)? CaO(s)+ H₂O(l)→ Ca²⁺(aq)+ 2 OH^-(aq)

What is the pH of a 0.040 M HClO₄ solution?

Calculate the concentration of bicarbonate ion,HCO₃^-,in a 0.010 M H₂CO₃ solution that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11.

A 1.25 × 10^-4 M solution of the anti-inflammatory drug naproxen has a pH = 4.2.The K_a and pK_a of naproxen are and .

A weak base ionizes in water as follows: B_(aq) + H₂O_(l) ⇌ BH⁺_(aq)+ OH^-_(aq) A 0.150 M solution of B is 2.500 % ionized at 25ºC.What is the pH of this solution?

What is the identity of M in the hydrate M(H₂O)₆ⁿ⁺ that has the 0.10 M solution with the highest pH?

What is the strongest Br∅nsted-Lowry acid in the chemical reaction shown below? 2 HNO₃(aq)+ Ba(OH)₂(aq)→ Ba(NO₃)₂(aq)+ 2 H₂O(l)

From the following chemical reactions determine the relative Br∅nsted-Lowry acid strengths (strongest to weakest). HCl(aq)+ H₂O(l)→ H₃O⁺(aq)+ Cl^-(aq) HCN(aq)+ H₂O(l)⇌ H₃O⁺(aq)+ CN^-(aq)

-Which of the above pictures represents a solution of a diprotic acid H₂A for which K_a1 = ∞ and K_a2 is exceptionally small.(Water molecules have been omitted for clarity. )

The pH of 0.150 M CH₃CO₂H,acetic acid,is 2.78.What is the value of K_a for acetic acid?

Using the conjugate acid-base pairs listed below,complete the following equation with the pair that gives an equilibrium constant K_c > 1. + H₂CO₃ ⇌ + HCO₃^-

Calculate the pH of a 0.060 M carbonic acid solution,H₂CO₃₍_aq_),that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11.

At 25°C,the pH of a vinegar solution is 2.60.What are the values of [H₃O⁺] and [OH^-] in the solution?

What is the pH of a 0.020 M Ba(OH)₂ solution?