PH Calculations

What is the [H⁺] in a solution with a pH of 11?

• 1 x 10^-1 M

• 1 x 10^-2 M

• 1 x 10¹¹ M

• 1 x 10^-11 M

What is the pH of a solution that has a [H+] of 2.5 x 10-5?

4.605.02.57

• 4.6

• 5.0

• 2.5

• 7.0

What is the [OH-] if the [H+] is 1.0 x 10-3 M?

• 1.0 x 10-3 M

• 6.02 x 10-23 M

• 1.0 x 10-14 M

• 1.0 x 10-11 M

What is the [OH-] if the pH is 4.9?

• 7.94 x 10-10 M

• 1.0 x 10-4 M

• 7.94 x 10-14 M

• 4.9 x 10-10 M

A solution has a pH of 6.9. This solution is _____.

• an acid

• a base

• neutral

If a solution has a very low pH, the hydroxide concentration is _______.

• very high

• very low

• zero

If a solution has a very high pH, the hydroxide concentration is _______.

• very high

• very low

• zero

Which of the following is the strongest base?

• 4

• 14

• 7

• 15

What does pH measure?

• the amount of hydrogen (H⁺) ions

• the amount of hydroxide (OH^-) ions

• amount of water

• all of the above

What is the [OH-] if the pH is 4.9? (Hint: First find pOH. Then find [OH-].)

• 7.94 x 10-10 M

• 1.0 x 10-4 M

• 7.94 x 10-14 M

• 4.9 x 10-10 M