Is acetic acid a strong acid?

NO!!!

It is a weak acid, because when dissolved in water only a few of the hydrogen ions dissociate from the 'parent' molecule.

It is represented by the equation

CH3COOH(aq) CH3COO^-(aq) + H^(+)(aq)

The equilbrium arrow '' indicate that most of the molecules remain undissociated.

NB All Carboxylic(Fatty) Acids are weak acids.