Write a Balanced Half-Reaction for the Reduction of CrO₄^2-(aq) to Cr(OH)₃(s)

Multiple Choice

Write a balanced half-reaction for the reduction of CrO₄^2-(aq) to Cr(OH) ₃(s) in a basic solution.

A) CrO₄^2-(aq) + 3 OH^-(aq) + 3 e^- ? Cr(OH) ₃(s) + 2 O₂(g)
B) CrO₄^2-(aq) + 3 H⁺(aq) + 3 e^- ? Cr(OH) ₃(s)
C) CrO₄^2-(aq) + 3 H⁺(aq) ? Cr(OH) ₃(s) + 2 e^-
D) CrO₄^2-(aq) + 4 H₂O( $\ell$ ) + 3 e^- ? Cr(OH) ₃(s) + 5 OH^-(aq)
E) CrO₄^2-(aq) + 3 OH^-(aq) ? Cr(OH) ₃(s) + 2 O₂(g)