Question

Write a balanced half-reaction for the reduction of CrO42-(aq) to Cr(OH)3(s) in a basic solution.
A.CrO42-(aq) + 3 OH-(aq) + 3 e- Cr(OH)3(s) + 2 O2(g)
B.CrO42-(aq) + 3 H+(aq) + 3 e- Cr(OH)3(s)
C.CrO42-(aq) + 3 H+(aq) Cr(OH)3(s) + 2 e-
D.CrO42-(aq) + 4 H2O() + 3 e- Cr(OH)3(s) + 5 OH-(aq)
E.CrO42-(aq) + 3 OH-(aq) Cr(OH)3(s) + 2 O2(g)

Answer

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