AP Chem Topics 8.1 - 8.3

What is the pH of a solution whose pOH is 5.70?

• 5.70

• 4.30

• 3.00 x 10⁵

• 8.30

What is the pH of a 0.5 M Ba(OH)₂ solution closest to?

• 0

• 0.5

• 13.5

• 14

If a solution with a pH of 2.75 is diluted with water by a factor of 100, what is its new pH?

• 0.75

• 4.75

• 11.25

• 9.25

Lactic acid, HC₃H₅O₃, has one acidic hydrogen. A 1.00 M solution of lactic acid has a pH of 2. Calculate K_a.

• 1 x 10^-9

• 1 x 10^-10

• 1 x 10^-4

• 1 x 10^-5

Butyric acid has a Ka of 2.0 x 10^-6 determine the pH of a 2.00 M sample of it.

• 5 x 10^-3

• 2.7

• 5.5 x 10^-4

• 3.7

If the Ka of an acid is 8 x 10^-4 and the initial concentration of an acid is 0.5, what is the percent ionization?

• 70%

• 0.07%

• 0.04%

• 4%

A 0.25 M solution of phenylphthaline is made, the pH eventually reaches a value of 3.5. Which is closest to the Ka for phenylphthaline?

• 1 x 10^-7

• 4 x 10^-7

• 10.5

• 5.5

A 0.01 M solution of a benzodiazepine (a base) is made, the pH eventually reaches a value of 10.5. Which is closest to the pKb for this benzodiazepine?

• 5

• 1 x 10^-5

• 1 x 10^-9

• 9

A 0.8 M acid solution eventually reaches a pH of 2, what is the percent ionization?

• 0.013

• 79

• 1.3

• 2.5

Which of the following will produce the MOST basic solution?

• 0.025 M NH₄Cl

• 0.030 M NaBr

• 0.088 M NaCH₃COO

• 0.05 M LiCN