镁铝合金在碱性溶液中开始反应缓慢，后反应加速。经分析是氧化膜及微小原电池作用的结果。下列叙述正确的是_刷题宝

题干

镁铝合金在碱性溶液中开始反应缓慢，后反应加速。经分析是氧化膜及微小原电池作用的结果。下列叙述正确的是

A：原电池的负极是镁

B：负极的电极反应式是Mg-2e = Mg²⁺

C：原电池的负极是铝

D：正极的电极反应式是2H⁺+2e = H₂↑

上一题下一题 0.0难度选择题更新时间:2016-06-07 06:13:07

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C

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