The balanced half-reaction in which dichromate ion is reduced to chromium metal is a ________ process.
A)two-electron
B)six-electron
C)three-electron
D)four-electron
E)twelve-electron

Question

Quizplus · Accepted Answer

The reduction of dichromate ion (Cr2O7^2-) to chromium metal (Cr) involves a twelve-electron process. This is because each Cr in the dichromate ion gains six electrons to become Cr metal, and since there are two Cr atoms involved, the total is twelve electrons.

The Balanced Half-Reaction in Which Dichromate Ion Is Reduced to Chromium