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【单选题】
标准状态下,反应 Cr 2 O 7 2- +6Fe 2+ +14H + =2Cr 3+ +6Fe 3+ +7H 2 O 正,则最强的氧化剂及还原剂分别为:A.
Fe 3+ 、 Cr 3+
B.
Cr 2 O 7 2- 、 Fe 2+
C.
Fe 3+ 、 Fe 2+
D.
Cr 2 O 7 2- 、 Cr 3+
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B.
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A.
up
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seriously
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