Chemistry Help!

Question

What is the ph of a solution containing .10 M Na2C2O4 (sodium oxalate) ?

Answer 1

C2O4^2– + 2H2O ==> H2C2O4 + 2OH-

Look up Kb for oxalate (C2O4) and plug in to the equation

Kb = [x][2x]²/(0.1 M) and solve for x which will be the [OH-]

Find pOH and subtract from 14 to get pH