Phosphoric acid is a triprotic acid with the following pKa values:pKa1=2.148, pKa2=7.198, pKa3=12.375You wish to prepare 1.000 L of a 0.0500 M phosphate buffer at pH 7.540. To do this, you choose to mix the two salt forms involved in the second ionization, NaH₂PO₄ and Na₂HPO₄ in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?Mass NaH₂PO₄.Mass Na₂HPO₄.What other combination of phosphoric acid and/or its salts could be mixed to prepare this buffer?
