Question

please explain acid bases salt 

Answer 1

Acids are those substances which gives H+ ions when dissolve in water.
Bases are those which gives OH- ions when dissolve in water.
Salt are the compound when reaction takes place between an acid and base.

Answer 2

acid: a substance which ionizes to form H+ ( H+ is product)
base: a substance which accept ( reacts with) H+
salt: any ionic compound whose anion comes from an acid and whose cation comes from base