Write a balanced half-reaction for the reduction of CrO 4 2- (aq) to Cr(OH) 3 (s) in a basic solution.

In a basic solution, water and hydroxide ions are used to balance the oxygen and hydrogen atoms. The correct half-reaction is balanced for mass and charge, with water and hydroxide ions appropriately placed.

Write a balanced half-reaction for the reduction of CrO 4 2- (aq) to Cr(OH) 3 (s) in a basic solution.

In a basic solution, water and hydroxide ions are used to balance the oxygen and hydrogen atoms. The correct half-reaction is balanced for mass and charge, with water and hydroxide ions appropriately placed.

Solved

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

Question 8

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)