1.\[CuSO_4\ and\ excess\ Ba(OH_2)\ :\ Cu^{2+}+SO_4^{2-}+Ba^{2+}+2OH^- \xrightarrow{\quad\quad} Cu(OH)_2\downarrow+BaSO_4\downarrow\\\] 2.\[NaHCO_3\ and\ excess\ NaOH\ : NH_4^++HCO_3^-+2OH^- \xrightarrow{\quad\quad}NH_3\cdot H_2O+CO_3^{2-}+H_2O\] 3.\[…