Question #fede8 - Socratic The pH is approximately 9 69, I would grade this is fairly difficult Let's assume these salts totally dissolve in solution KH_2PO_4 rightleftharpoons K^(+)+H_2PO_4^(-) K_2HPO_4 rightleftharpoons 2K^(+)+HPO_4^(2-) Starting with the first salt, 2g * (KH_2PO_4) (136g) = 1 47*10^-2mol and the second, 4g * (K_2HPO_4) (174g) = 2 30*10^-2mol We may assume the ions will be in equal moles Hence, [H