A.Ca(HCO 3 ) 2 溶液中滴加少量NaOH溶液 Ca 2+ +HCO 3 – +OH – = CaCO 3 ↓+ H 2 O |
B.NaHSO 4 溶液中滴加少量Ba(OH) 2 溶液 H + +SO 4 2- +Ba 2+ +OH – = BaS0 4 ↓+H 2 O |
C.FeBr 2 溶液中通人过量C1 2 2Fe 2+ +6Br – +4C1 2 = Fe 3+ +3Br 2 +8C1 — |
D.FeSO 4 溶液中加入H 2 O 2 溶液的反应: Fe 2+ +2H 2 O 2 +4H + =Fe 3+ +4H 2 O |