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高中化学电化学方程式应该怎么写啊

2024-11-30 17:26:13

推荐回答（1个）

回答1：

　　镁-H2O2酸性电池采用海水作电解质溶液（加入一定量的酸），下列说法正确的是A
A,电池总反应的离子方程式为：Mg+H2O2+2H+ =Mg2+ +2H2O
B 负极的电极反应式为：
　　过氧化氢+2氢离子+2电子=2水分子
　　正确的是：Mg-2e-=Mg2+
C工作时，正极周围海水的PH减小
　　正极：H2O2+2e- +2H+ =2H2O所以工作时，正极周围海水的PH增大

　　D电池工作时，溶液中的氢离子向负极移动。
　　正确的是：电池工作时，溶液中的氢离子向正极移动

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