Acid, Base, pH, pOH Review

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

What is a conjugate acid?

Back

A conjugate acid is the species that results when a base accepts a hydrogen ion.

Front

What is a base?

Back

A base is a substance that releases OH- ions when dissolved in water.

Front

How do you calculate the concentration of H+ ions from pH?

Back

[H+] = 10^(-pH).

Front

How do you calculate the concentration of OH- ions from pOH?

Back

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

Front

What is the pH of a solution with [OH-] = 8.41 x 10^-4?

Back

10.92.

Front

What is the pOH of a solution with [H+] = 1.0 x 10^-3?

Back

pOH = 11.

Front

What happens to pH when the concentration of H+ ions increases?

Back

The pH decreases, indicating a more acidic solution.