这道化学题为啥选D而不是B?3.已知金属M的下列标准电极电势数据:(1) M2+(aq) +e = M+ (aq),E= -0.60 V (2) M3+(aq) +2e = M+(aq),E= 0.20 V则 M3+(aq) + e = M2+(aq)的E是:A.0.80 V B.-0.20 V C.-0.40 V D.1.00 V
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![这道化学题为啥选D而不是B?3.已知金属M的下列标准电极电势数据:(1) M2+(aq) +e = M+ (aq),E= -0.60 V (2) M3+(aq) +2e = M+(aq),E= 0.20 V则 M3+(aq) + e = M2+(aq)的E是:A.0.80 V B.-0.20 V C.-0.40 V D.1.00 V](/uploads/image/z/2259397-37-7.jpg?t=%E8%BF%99%E9%81%93%E5%8C%96%E5%AD%A6%E9%A2%98%E4%B8%BA%E5%95%A5%E9%80%89D%E8%80%8C%E4%B8%8D%E6%98%AFB%3F3.%E5%B7%B2%E7%9F%A5%E9%87%91%E5%B1%9EM%E7%9A%84%E4%B8%8B%E5%88%97%E6%A0%87%E5%87%86%E7%94%B5%E6%9E%81%E7%94%B5%E5%8A%BF%E6%95%B0%E6%8D%AE%3A%281%29+M2%2B%28aq%29+%2Be+%3D+M%2B+%28aq%29%2CE%3D+-0.60+V+%282%29+M3%2B%28aq%29+%2B2e+%3D+M%2B%28aq%29%2CE%3D+0.20+V%E5%88%99+M3%2B%28aq%29+%2B+e+%3D+M2%2B%28aq%29%E7%9A%84E%E6%98%AF%EF%BC%9AA.0.80+V+B.-0.20+V+C.-0.40+V+D.1.00+V)
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