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【多选题】
镍氢充电电池有着广泛应用,镍及其化合物能发生下列反应: 1Ni+2HCl=NiCl2+H2↑ 2NiO+2HCl=NiCl2+H2O 3NiO2+4HCl=NiCl2+Cl2↑+2H2O Ni(OH)2 不溶于水。对上述反应的分析判断正确的是A.
镍不能与氯化铜溶液发生置换反应
B.
反应②和③都是复分解反应
C.
NiCl 2 能与 NaOH 溶液发生复分解反应
D.
反应 ①、③中 Ni 的化合价都发生了变化
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