Question 1

Which of the following is not a conjugate acid-base pair?

Accepted Answer

A)  H2O and OH-
B)  H2O and H3O+
C)  H3O+ and OH-
D)  HO2- and H2O2
E)  O22- and HO2-

Question 2

Which one of these salts will form an acidic solution upon dissolving in water?

Accepted Answer

A)  LiBr
B)  NaF
C)  NH4Br
D)  KOH
E)  NaCN

Question 3

Will a 0.1 M solution of NH4CN(aq)be acidic, basic, or neutral?

Accepted Answer

Question 4

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

Question 5

Predict the direction in which the equilibrium will lie for the reaction C6H5COO- + HF 6H5COO- + HF      C6H5COOH + F- . Ka(C6H5COOH) = 6.5 × 10-5; Ka(HF) = 7.1 × 10-4 A) to the right B) to the left C) in the middle" class="answers-bank-image d-inline" rel="preload" >  
 C6H5COOH + F- .
Ka(C6H5COOH) = 6.5 × 10-5; Ka(HF) = 7.1 × 10-4

Accepted Answer

A)  to the right
B)  to the left
C)  in the middle

Question 6

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

Question 7

Arrange the acids HBr, H2Se, and H3As in order of increasing acid strength.

Accepted Answer

A)  HBr 2Se 3As
B)  HBr 3As 2Se
C)  H2Se 3As 
D)  H3As 2Se 
E)  H3As 2Se

Question 8

The pH of a Ba(OH) 2 solution is 10.00.What is the H+ ion concentration of this solution?

Accepted Answer

A)  4.0 × 10-11 M
B)  1.6 × 10-10 M
C)  1.3 × 10-5 M
D)  1.0 × 10-10 M
E)  10.M

Question 9

What is the pH of a 0.30 M solution of HOCl (Ka = 3.5 x 10-8)

Accepted Answer

A)  7.45
B)  6.54
C)  7.98
D)  5.22
E)  3.99

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 the following solutions is basic?

Accepted Answer

A)  [OH-] = 1.0 x 10-14 M
B)  [OH-] = 1.0 x 10-7 M
C)  [H3O+] = 1.0 x 10-14 M
D)  [H3O+] > 1.0 x 10-7 M
E)  [OH-] -7 M

Question 12

A tablet of a common over-the-counter drug contains 200.mg of caffeine (C8H10N4O2) .What is the pH of the solution resulting from the dissolution of two of these tablets in 225.mL of water? (For caffeine, Kb = 4.1 × 10-4.)

Accepted Answer

A)  2.76
B)  7.67
C)  10.96
D)  6.33
E)  11.24

Question 13

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

Accepted Answer

Question 14

Calculate the pOH for a solution with [H3O+] = 3.1 x 10-9 M

Accepted Answer

A)  3.10
B)  10.90
C)  8.51
D)  5.49
E)  3.2 x 10-6

Question 15

Which one of these statements about strong acids is true?

Accepted Answer

A)  All strong acids have H atoms bonded to electronegative oxygen atoms.
B)  Strong acids are 100% ionized in water.
C)  The conjugate base of a strong acid is itself a strong base.
D)  Strong acids are very concentrated acids.
E)  Strong acids produce solutions with a higher pH than weak acids.

Question 16

If the pH of stomach acid is 1.0, what is the hydroxide ion concentration in this solution?

Accepted Answer

The answer of If the pH of stomach acid is...

Question 17

Write the formula for the conjugate base of H3PO4

Accepted Answer

Question 18

Calculate the pOH for a solution with [H3O+] = 2.5 x 10-5 M

Accepted Answer

A)  4.60
B)  9.40
C)  4.0 x 10-10
D)  2.50
E)  11.50

Question 19

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.

Question 20

The pH of a 0.14 M solution of an unknown monoprotic acid is 5.85.Calculate the Ka of the acid.

Accepted Answer

A)  1.4 x 10-6
B)  1.4 x 10-11
C)  1.0 x 10-5
D)  7.1 x 10-9
E)  2.0 x 10-7

Exam 15: Acids and Bases

If the pH of stomach acid is 1.0, what is the hydroxide ion concentration in this solution?

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Calculate the pOH for a solution with [H3O+] = 2.5 x 10-5 M

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The pH of a 0.14 M solution of an unknown monoprotic acid is 5.85.Calculate the Ka of the acid.

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

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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?

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Which of the following is not a conjugate acid-base pair?

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Which of the following solutions is basic?

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What is the pH of a 0.30 M solution of HOCl (Ka = 3.5 x 10-8)

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Write the formula for the conjugate base of H3PO4

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Will a 0.1 M solution of NH4CN(aq)be acidic, basic, or neutral?

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Predict the direction in which the equilibrium will lie for the reaction C6H5COO- + HF C6H5COOH + F- . Ka(C6H5COOH) = 6.5 × 10-5; Ka(HF) = 7.1 × 10-4

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

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A tablet of a common over-the-counter drug contains 200.mg of caffeine (C8H10N4O2) .What is the pH of the solution resulting from the dissolution of two of these tablets in 225.mL of water? (For caffeine, Kb = 4.1 × 10-4.)

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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?

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The pH of a Ba(OH) 2 solution is 10.00.What is the H+ ion concentration of this solution?

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Arrange the acids HBr, H2Se, and H3As in order of increasing acid strength.

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Which one of these statements about strong acids is true?

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

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Which one of these salts will form an acidic solution upon dissolving in water?

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Calculate the pOH for a solution with [H3O+] = 3.1 x 10-9 M

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Calculate the pOH for a solution with [H₃O⁺] = 2.5 x 10^-5 M

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The pH of a 0.14 M solution of an unknown monoprotic acid is 5.85.Calculate the K_aof the acid.

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

Correct Answer
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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?

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What is the pH of a 0.30 M solution of HOCl (K_a = 3.5 x 10^-8)

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Write the formula for the conjugate base of H₃PO₄

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Will a 0.1 M solution of NH₄CN(aq)be acidic, basic, or neutral?

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Predict the direction in which the equilibrium will lie for the reaction C₆H₅COO^- + HF C₆H₅COOH + F^-. K_a(C₆H₅COOH) = 6.5 × 10^-5; K_a(HF) = 7.1 × 10^-4

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

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A tablet of a common over-the-counter drug contains 200.mg of caffeine (C₈H₁₀N₄O₂) .What is the pH of the solution resulting from the dissolution of two of these tablets in 225.mL of water? (For caffeine, K_b = 4.1 × 10^-4.)

Correct Answer
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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?

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The pH of a Ba(OH) ₂ solution is 10.00.What is the H⁺ ion concentration of this solution?

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Arrange the acids HBr, H₂Se, and H₃As in order of increasing acid strength.

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Calculate the pOH for a solution with [H₃O⁺] = 3.1 x 10^-9 M

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