Unit 11: Packet: pH pOH Worksheet

Front

What is pH?

Back

pH is a measure of the acidity or basicity of a solution, defined as the negative logarithm of the hydrogen ion concentration: pH = -log[H+].

Front

What is pOH?

Back

pOH is a measure of the basicity of a solution, defined as the negative logarithm of the hydroxide ion concentration: pOH = -log[OH-].

Front

What is the relationship between pH and pOH?

Back

pH + pOH = 14 at 25°C.

Front

How do you calculate [OH-] from pOH?

Back

[OH-] = 10^(-pOH).

Front

How do you determine if a solution is acidic, basic, or neutral based on pH?

Back

A solution is acidic if pH < 7, neutral if pH = 7, and basic if pH > 7.

Front

What is the [H+] concentration of a solution with a pH of 3?

Back

[H+] = 10^(-3) M = 0.001 M.

Front

What is the [OH-] concentration of a solution with a pOH of 4?

Back

[OH-] = 10^(-4) M = 0.0001 M.

Front

Calculate the pH of a solution with [H+] = 0.0001 M.

Back

pH = -log(0.0001) = 4.

Front

Calculate the pOH of a solution with [OH-] = 0.01 M.

Back

pOH = -log(0.01) = 2.

Front

What is the pH of a neutral solution at 25°C?

Back

pH = 7.