Answer. These salts are formed by partial replacement of replaceable H+ ions of an acid by a positive metal ion. For example,
H2SO4(aq) + KOH(aq) —————> KHSO4(aq) +(1)
H3PO4(aq) + NaOH(aq) —————> NaH2PO4(aq) + H2O(1)
1. They turn blue litmus red.
2. They react with bases to form normal salts.