(1)酒精灯
(2)CaCO 3+ 2HCl = CaCl 2+ H 2O + CO 2↑ AD 2H 2O 2
2H 2O + O 2↑
(3)将导气管移出水槽,再熄灭酒精灯 2KMnO 4
K 2MnO 4+ MnO 2+ O 2↑
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