Question

Phosphoric acid has three titratable hydrogen ions; the respective equilibria are expressed as follows: - HBP04 H+ + H2P04 pK1 = 2.1 H2P041- H++ HPO42- pK2 = 6.8 HP042. 2 H++ P043- pK3 = 12.4 How would you prepare 1L of a 1 M phosphate buffer, pH 7.5? Your available chemicals include solid NaH2P04, solid Na2HP04solid NaQH, and 6 M HCl solution. Indicate how you would prepare this buffer using each of the three methods

Answer 1

PHpKa 102 Salt) LALd since buffer soin be Preaured has pH-75 let us use the n ion satran 2 1oa CHe2