Topic: Need help with half reactions and cell potentials (Read 11445 times)

plaito_999 · « **Reply #15 on:** May 31, 2010, 09:35:02 AM »

Borek, when you say reverse the reaction do you mean reverse it to this 2 Cr³⁺ + 3H₂O₂ + 10 OH^-

2CrO₄^2- + 8H₂O

Also, thank you so much to everyone who has helped, I really appreciate it.

Borek · « **Reply #16 on:** May 31, 2010, 09:37:24 AM »

2 Cr³⁺ + 3H₂O₂ + 10 OH^- 2CrO₄^2- + 8H₂O

Cr(OH)₃, but in general yes, that's what I meant - exchange lhs with rhs.

vickium · « **Reply #17 on:** May 31, 2010, 01:10:11 PM »

Borek, so then the final answer is ... 3H₂O₂ + 2Cr(OH)₃ + 4OH^-

8H₂O + 2CrO₄^2- ?