下列反应的离子方程式正确的是 A.铜溶于浓硝酸:Cu + 4H+ + 2NO3-= Cu

下列反应的离子方程式正确的是

A.铜溶于浓硝酸:Cu + 4H+ + 2NO3= Cu2+ + 2NO2↑+ 2H2O

B.氯化铝溶液与过量氨水反应:Al3++4NH3·H2O= AlO2+4NH4++2H2O

C.氯气与水反应:Cl2H2O2HClClO

D.二氧化氮与水反应:3NO2+ H2O= NO+2H++2NO3-

答案

 

【答案】AD

 【解析】氢氧化铝不溶于氨水B错误,次氯酸是弱酸不可以拆开,C错误。

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