MnO4^- + 2H2O + 3e ==>MnO2 + 4 OH^-
is the half reaction for permanganate. Add in the Al. Let me know if you have trouble.
How do i balance the oxidation-recution reaction Al(s)+MnO4(aq)-->MnO2(s)+Al(OH)4(aq) if it is in a basic solution?
2 answers
You may have trouble balancing it if you don't add a 1 negative charge to the Al(OH)4^-