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Oxalic acid is a diprotic acid that occurs naturally in some plants. Calculate the pH and the concentrations of all species present in a 0.19-M solution. The acid dissociation constants are K1 = 5.9 10-2 and K2 = 6.4 10-5.

a) [C2O4H2] ANSWER: .13 M

b) [C2O4H ? ]

c) [C2O42-] M

d) [H+] M

e) pH

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