As technician in a large pharmaceutical research firm, you have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00MKH2PO4 solution, as well as a carboy of pure distilledH2O. How much 1.00 M KH2PO4 will you need to make this solution? You require forming 400. ml of 1.00 M potassium phosphate solution of the pH = 7.00. The pKa of H2PO4 is 7.21.