Đáp án:
Câu 1:
$$Fe^{3+} + 3H_2O \rightleftharpoons Fe(OH)_3 + 3H^{+}$$
$$Al^{3+} + 3H_2O \rightleftharpoons Al(OH)_3 + 3H^{+}$$
$$Cu^{2+} + 2H_2O \rightleftharpoons Cu(OH)_2 + 2H^{+}$$
Câu 2:
Fe(NO_3)_3 \to Fe^{3+} + 3NO_3^{-}
$$Fe^{3+} + 3H_2O \rightleftharpoons Fe(OH)_3 + 3H^{+}$$
AlCl_3 \to Al^{3+} + 3Cl^{-}
$$Al^{3+} + 3H_2O \rightleftharpoons Al(OH)_3 + 3H^{+}$$