Oxalic acid is a diprotic acid that occurs naturally in some plants. Calculate the pH and the concentrations of all species present in a 0.72-M solution. The acid dissociation constants are K1 = 5.9 10-2 and K2 = 6.4 10-5.
[C2O4H2] = ? M
[C2O4H ? ] = ? M
[C2O42-] = ? M
[H+] = ? M
pH = ?