pH

Question 1

The pOH of a solution is 10.75. What is the concentration of OH– ions in the solution?Use .

Revolt · Accepted Answer

1.778 10–11 M

Question 2

Which of these correctly defines the pH of a solution?

Revolt · Accepted Answer

the negative log of the hydronium ion concentration

Question 3

Note the pH and pOH values labeled with letters on the pH scale below.Based on log rules and the way pH is calculated, what is the difference in [OH– ] concentration between point A and point B.

Revolt · Accepted Answer

106

Question 4

A substance with a high [H+ ] would likely have which additional characteristics?

Revolt · Accepted Answer

a low [OH– ] and a high pOH

Question 5

Based on the definition of logarithms, what is the difference in hydrogen ion concentration between a substance with a pH of 2 and a substance with a pH of 3?

Revolt · Accepted Answer

A substance with a pH of 2 has a 10 times higher concentration of H+ than a substance with a pH of 3.

Question 6

The pH of a solution decreases by 2.0. How does the hydronium ion concentration of the solution change?

Revolt · Accepted Answer

increases to 100 times the original concentration

Question 7

What is the equilibrium constant of pure water at 25°C?

Revolt · Accepted Answer

10–14

Question 8

A solution containing HCl would likely have

Revolt · Accepted Answer

a low pH and a high pOH.

Question 9

The pH of a solution is 2.0. Which statement is correct?Useful formulas include , , , and .

Revolt · Accepted Answer

The pOH of the solution is 12.0.

Question 10

Which describes an alkaline solution?

Revolt · Accepted Answer

basic

pH Answers

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