AP Chem
posted by rose on .
I'm having trouble balancing these two oxidationreduction reactions that occur in a basic solution. Can anyone help? Please? The numbers after the formulas are subscripts and any with a minus sign means they are negatively charged (1). Thanks!!
Al(s)+ MnO4(aq)> MnO2(s)+Al(OH)4(aq)
NO2(aq)+Al(s)>NH3(g)+AlO2 (aq)

Here are the two half equations (unbalanced) for the first one.
Al + 4OH^ ==> Al(OH)4^ + 3e
MnO4^ + 2H2O + 3e ==> MnO2 + 4OH^
Add the two equations to obtain the balanced equation.