What is volatile and non volatile acids?
A volatile substance is a substance which vapourises easily when left in open. It readily changes from liquid state to vapour state at normal temperatures and pressure.
Hence an acid which vapourises readily is a volatile acid. For example Hydrochloric acid.
A non-volatile acid on the other hand is a substance which does not vapourises easily and will not undergo change of state, i.e. it will remain in a liquid state.