Acetic acid is a weak acid. List in order of descending concentration all of the ionic and molecular species present in 1M aqueous solution of acetic acid.

Explanation

Acetic acid ionises in water as
`CH_(3)COOH(l)+H_(2)O(l)hArrCH_(3)COO_((aq))^(-)+H_(3)O_((aq))^(+)`
Since acetic acid is weak electrolyte, it ionises to a lesser extent. So the concentration of the ionic and molecular species present in 1M aqueous solution of acetic acid will be in the order
`[H_(2)O]gt[CH_(3)COOH]gt[H_(3)O^(+)]=[CH_(3)COO^(-)]gtOH^(-)`