Question

What are strong acids and weak acids?

Answer 1

Acid solutions contain hydrogen ions. The higher the concentration of hydrogen ions, the lower the pH. Hydrochloric acid is a strong acid and ethanoic acid is a weak acid. Strong acids are fully ionised but weak acids are only partly ionised in solution. At the same concentration, strong acids have a higher concentration of hydrogen ions than weak acids. The electrolysis of acids produces hydrogen gas at the negative electrode.

Answer 2

Strong Acid:

A strong acid is an acid which, in aqueous solution, completely dissociates into H + ions and a very weak base, referred to as the conjugated base of the acid.

Weak Acid:

A weak acid is an acid which does not completely dissociate in water.