Question

含有Na2HPO4和Na3PO4的水溶液的氢离子浓度

Answer 1

HPO4(2-) = PO4(3-) + H(+)

c(H+) = K3*c(Na2HPO4)/c(Na3PO4) = K3 = 4.5*10^(-13)

pH = 12.35