Question

What is the molar solubility of barium oxalate(BaC2O4) in a solution buffered to a pH of 6.65? The Ksp for BaC2O4 is 2.3 x 10^-8 and the Ka's for H2C2O4 are Ka1 = 5.9 X 10^-2 and Ka2 = 6.4 x 10^-5. (Write over all equilibrium equation and calculate K for doing equilibrium.)

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