Acids and Bases

Front

What is pOH?

Back

pOH is a measure of the concentration of hydroxide ions (OH^-) in a solution. It is calculated as pOH = -log[OH^-].

Front

What is the relationship between pH and pOH?

Back

pH + pOH = 14 at 25°C. This means that if you know the pH, you can find the pOH and vice versa.

Front

How do you calculate the [H⁺] from pH?

Back

[H⁺] = 10^-pH. For example, if pH = 4, then [H⁺] = 10^-4 M.

Front

What is the [H⁺] if the pH is 4.0?

Back

1.0 x 10^-4 M.

Front

What is the definition of an acid?

Back

An acid is a substance that donates protons (H⁺) in a chemical reaction.

Front

What is the definition of a base?

Back

A base is a substance that accepts protons (H⁺) or donates hydroxide ions (OH^-) in a chemical reaction.

Front

What is KOH?

Back

KOH is potassium hydroxide, which is a strong base.

Front

What is HF?

Back

HF is hydrofluoric acid, which is a weak acid.

Front

What happens when an acid reacts with a base?

Back

They undergo a neutralization reaction to produce water and a salt.

Front

What is the general formula for calculating pH?

Back

pH = -log[H⁺].