pH and pOH Calculation Practice

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[H₃O⁺].

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 [H₃O⁺] from pH?

Back

[H₃O⁺] = 10^-pH.

Front

How do you calculate pH from [H₃O⁺]?

Back

pH = -log[H₃O⁺].

Front

If the pH of a solution is 8, what is [H₃O⁺]?

Back

1.0 x 10^-8 M.

Front

If the pH is 4.0, what is [H₃O⁺]?

Back

1.0 x 10^-4 M.

Front

What is the pH of a solution with [H₃O⁺] = 6.8 x 10^-8 M?

Back

7.17.

Front

What is the pH of a solution with [H₃O⁺] = 1 x 10^-3 M?

Back

3.

Front

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

Back

7.