What ratio of K2HPO4 to KH2PO4 is needed to obtain a solution of pH 7.00?
The dissociation of the second hydrogen of a phosphoric acid has a pK of 7.21. What ratio of K2HPO4 to KH2PO4 is needed to obtain a solution of pH 7.00?
Acid dissociation constants - You want to make a pH 7.0 buffer using NaOH and phosphoric acid. The sum of the concentrations of all phosphoric acid species is 0.100 M. The acid dissociation constants are as follows:
Calculate ...