Question 83 What would the concentration of OH- be if the concentration of H3O+

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Question 83

What would the concentration of OH- be if the concentration of H3O+ was 1 × 10-8M?

[H3O+]× [OH-] = Kw = 1 × 10-14

A.1 × 10-14

B.1 × 10-6

C.1 × 108

D.1 × 106

E.1 × 10-8

Question 84

What is the relationship between the hydroxide ion and a water molecule?

A. A hydroxide ion is a water molecule plus a proton.

B.A hydroxide ion and a water molecule are the same things.

C.A hydroxide ion is a water molecule minus a hydrogen nucleus.

D.A hydroxide ion is a water molecule plus two extra electrons.

Question 85

What happens to the pH of an acidic solution as water is added?

A.The pH is not influenced by the addition of water.

B.The pH will decrease as the solution becomes more dilute.

C.The pH will increase as the solution becomes more dilute.

D.The pH will decrease since more hydronium ions are produced from the water.

Question 86

When the hydronium ion concentration equals 10 moles per liter, what is the pH of the solution? Is the solution acidic or basic?

A.pH = 0, this is an acidic solution.

B.pH = 1, this is an acidic solution.

C.pH = -0.301, this is an acidic solution.

D.pH = 7, this is a neutral solution.

Question 87

When a hydronium ion concentration equals 1 × 10-10 moles per liter, what is the pH of the solution? Is the solution acidic or basic?

A.The pH of this solution is 4, which is acidic.

B.The pH of this solution is 8, which is basic.

C.The pH of this solution is 6, which is acidic.

D.The pH of this solution is 10, which is basic.

Question 88

According to the following reaction, which molecule is acting as a base? H2O + H2SO4 - H3O+ + HSO4-

A.H2SO4

B.H2O

C.H3O+

D.HSO4-

E.None of these

Question 89

If you were to increase the pH of rain water the concentration of dissolved CO2 would ________.

A.increase because the acid form is neutralized

B.decrease because you are adding acid

C.decrease because the acid form is neutralized

D.increase because you are adding acid

Question 90

Which of the following solutions is the most acidic?

A.a solution with a pH = 14

B.a solution with a pH = 10

C.a solution with a pH = 7

D.a solution with a pH = 4

E.All of the solutions are basic.

Explanation / Answer

83.B

84.C

85.C

86.B

87.D

88.D

89.C

90.D

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