What are the half reactions for this reaction? Zn in basic soln

Question

I cannot figure out the half reactions for this reaction:

Zn(s) 2H2O(l) 2OH^-(aq) -> Zn(OH)4^2-(aq) H2(g)

I need to know the half reactions, I cannot figure a way to seperate this equation out because of the water playing a double part in both half reactions...

Answer 1

Zn + 4OH-(aq) --> [Zn(OH)4]2+ + 2e

2H2O + 2e --> 2OH-(aq) + H2