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题型:单选题 题类:常考题 难易度:普通
ph的简单计算a 40
①Na2CO3:CO32﹣+2H2O⇌H2O+CO2↑+2OH﹣
②NH4Cl:NH4++H2O⇌NH3•H2O+H+
③CuSO4:Cu2++2H2O⇌Cu(OH)2+2H+
④NaF:F﹣+H2O═HF+OH﹣ .
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