Question 1

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 2

Identify the conjugate acid of CO32- in the reaction CO32- + H2PO4- 32- in the reaction CO32- + H2PO4-   HCO3- + HPO42- A) H2CO3 B) HCO3- C) H2O D) HPO42- E) H2PO4-" class="answers-bank-image d-inline" rel="preload" > HCO3- + HPO42-

Accepted Answer

A)  H2CO3
B)  HCO3-
C)  H2O
D)  HPO42-
E)  H2PO4-F) A) and B)
G) C) and E)

Question 3

Write the formula for the conjugate base of H2PO4-.

Accepted Answer

Question 4

Calculate the pH of a solution containing 0.20 g of NaOH in 2,000.mL of solution.

Accepted Answer

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

Question 5

What is the pH of 10.0 mL of 0.0020 M HCl?

Accepted Answer

A)  0.70
B)  2.70
C)  3.70
D)  5.70
E)  10.0F) A) and B)
G) B) and E)

Question 6

Which of the following yields an acidic solution when dissolved in water?

Accepted Answer

A)  NO2
B)  LiOH
C)  K2O
D)  NaCl
E)  Ca(OH) 2F) A) and E)
G) A) and C)

Question 7

In aqueous solutions at 25°C, the sum of the ion concentrations ([H+] + [OH -])equals
1 * 10 - 14.

Accepted Answer

A) True 
 B)False

Question 8

A 0.10 M NH3 solution is 1.3% ionized. Calculate the H+ ion concentration. NH3 + H2O 3 solution is 1.3% ionized. Calculate the H+ ion concentration. NH3 + H2O   NH4+ + OH- A) 1.3 * 10-3 M B) 7.7 * 10-2 M C) 7.7 * 10-12 M D) 0.13 M E) 0.10 M" class="answers-bank-image d-inline" rel="preload" > NH4+ + OH-

Accepted Answer

A)  1.3 * 10-3 M
B)  7.7 * 10-2 M
C)  7.7 * 10-12 M
D)  0.13 M
E)  0.10 MF) C) and D)
G) B) and E)

Question 9

Write the chemical formula for nitric acid.

Accepted Answer

The answer of Write the chemical formula for nitric acid....

Question 10

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)  8.0F) B) and C)
G) C) and E)

Question 11

Which of these acids is stronger, H3PO4 or H3AsO4?

Accepted Answer

Question 12

Calculate the hydrogen ion concentration in a solution of iced tea with lemon having a pH of 2.87.

Accepted Answer

A)  2.9 * 10-2 M
B)  5.7 * 10-2 M
C)  1.3 * 10-3 M
D)  2.9 * 10-3 M
E)  5.7 * 10-4 MF) C) and E)
G) C) and D)

Question 13

What is the pH of an aqueous solution that contains 5.3 *1017 OH- ions per liter of solution?

Accepted Answer

A)  5.30
B)  6.06
C)  7.94
D)  8.70
E)  11.3F) A) and B)
G) B) and D)

Question 14

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- 42- in the reaction HCO3- + HPO42-   H2CO3 + PO43- A) H2O B) HCO3- C) H2CO3 D) PO43- E) None of these." class="answers-bank-image d-inline" rel="preload" > H2CO3 + PO43-

Accepted Answer

A)  H2O
B)  HCO3-
C)  H2CO3
D)  PO43-
E)  None of these.F) D) and E)
G) All of the above

Question 15

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)  AlCl3F) A) and C)
G) B) and D)

Question 16

What mass of ammonium chloride must be added to 250.mL of water to give a solution with pH = 4.85? [Kb(NH3) = 1.8 *10-5]

Accepted Answer

A)  4.7 g
B)  75 g
C)  2.3 * 10-3 g
D)  19 g
E)  10.gF) C) and E)
G) C) and D)

Question 17

Hydrosulfuric acid is a diprotic acid, for which Ka1 = 5.7 * 10-8 and Ka2 = 1 *10-19.Determine the concentration of sulfide ion in a 0.10 M hydrosulfuric solution.

Accepted Answer

A)  0.10 M
B)  7.5 * 10-5 M
C)  5.7 * 10-9 M
D)  1 * 10-19 M
E)  1 * 10-20 MF) A) and B)
G) None of the above

Question 18

The pOH of a solution is 10.40.Calculate the hydrogen ion concentration in the solution.

Accepted Answer

A)  4.0 * 10-11 M
B)  3.6 M
C)  4.0 * 10-10 M
D)  2.5 * 10-4 M
E)  1.8 * 10-4 MF) A) and E)
G) B) and E)

Question 19

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.F) A) and C)
G) B) and C)

Question 20

Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?

Accepted Answer

The answer of Lime is used in farming to reduce...

Exam 15: Acids and Bases

Identify the conjugate acid of CO32- in the reaction CO32- + H2PO4- HCO3- + HPO42-

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Which of the following yields an acidic solution when dissolved in water?

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The pOH of a solution is 10.40.Calculate the hydrogen ion concentration in the solution.

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Calculate the hydrogen ion concentration in a solution of iced tea with lemon having a pH of 2.87.

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What mass of ammonium chloride must be added to 250.mL of water to give a solution with pH = 4.85? [Kb(NH3) = 1.8 *10-5]

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Hydrosulfuric acid is a diprotic acid, for which Ka1 = 5.7 * 10-8 and Ka2 = 1 *10-19.Determine the concentration of sulfide ion in a 0.10 M hydrosulfuric solution.

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Which of these acids is stronger, H3PO4 or H3AsO4?

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Calculate the pH of a solution containing 0.20 g of NaOH in 2,000.mL of solution.

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What is the pH of 10.0 mL of 0.0020 M HCl?

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

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A 0.10 M NH3 solution is 1.3% ionized. Calculate the H+ ion concentration. NH3 + H2O NH4+ + OH-

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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?

Correct AnswerverifiedThe hydronium ion concentratio...View AnswerShow Answer

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- H2CO3 + PO43-

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In aqueous solutions at 25°C, the sum of the ion concentrations ([H+] + [OH -])equals 1 * 10 - 14.

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What is the pH of an aqueous solution that contains 5.3 *1017 OH- ions per liter of solution?

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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?

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Write the formula for the conjugate base of H2PO4-.

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Write the chemical formula for nitric acid.

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Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?

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P4O10 is classified as an acidic oxide because it

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Identify the conjugate acid of CO₃^2- in the reaction CO₃^2- + H₂PO₄^- HCO₃^- + HPO₄^2-

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What mass of ammonium chloride must be added to 250.mL of water to give a solution with pH = 4.85? [K_b(NH₃) = 1.8 *10^-5]

Correct Answer
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Hydrosulfuric acid is a diprotic acid, for which K_a1 = 5.7 * 10^-8 andK_a2 = 1 *10^-19.Determine the concentration of sulfide ion in a 0.10 M hydrosulfuric solution.

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Which of these acids is stronger, H₃PO₄ or H₃AsO₄?

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A 0.10 M NH₃ solution is 1.3% ionized. Calculate the H⁺ ion concentration. NH₃ + H₂O NH₄⁺ + OH^-

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The hydronium ion concentratio...
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Identify the conjugate base of HPO₄^2- in the reaction HCO₃^- + HPO₄^2- H₂CO₃ + PO₄^3-

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In aqueous solutions at 25°C, the sum of the ion concentrations ([H⁺] + [OH^-])equals 1 * 10^{- 14}.

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What is the pH of an aqueous solution that contains 5.3 *10¹⁷ OH^- ions per liter of solution?

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Write the formula for the conjugate base of H₂PO₄^-.

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P₄O₁₀ is classified as an acidic oxide because it

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