Write balanced equations for the following steps in oxalate complex formation?

Question

a) dissolution of aluminium in KOH (aq). It is easier to work this out by assuming that the Al dissolves in water to give Al(OH)3, followed by reaction of this trihydroxide with KOH to give KAl(OH)4.

b) formation of the trioxalate complex, i.e. reaction of KAl(OH)4 with oxalic acid in the presence of excess KOH to give K3Al(C2O4)3.H2O

Answer 1

Al^3+ + 4KOH ===> 4K+ + Al(OH)4-

3H2C2O4 + 2KOH + KAl(OH)4 ===> K3Al(C2O4)3 + 3H2O