Balance the reduction half-reaction below in acid solution. How many electrons are in the balanced half-reaction?...
Balance the reduction half-reaction below in acid solution. How many electrons are in the balanced half-reaction?
Cr2O7 2-(aq) → Cr3+(aq)
Homework Answers
when balacing
Cr2O7-2 --> Cr+3
balance Cr
Cr2O7-2 --> 2Cr+3
Cr goes from +6 to +3, then
3 electrons per Cr, since we have 2 Cr
then
3*2 = 6 electrons are being transferred
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