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【单选题】
已知电对 I 2 /I - 和 MnO 4 - /Mn 2+ 在 25 °C时的 φ θ 各为 0.54V 和 1.51V ,若将其构成原电池的总反应式如下,则此原电池的 E θ 等于( )。 2MnO 4 - +16H + +10I - → 2Mn 2+ +8H 2 O+5I 2
A.
0.97V
B.
0.65V
C.
0.03V
D.
-0.97V
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