As a technician in a large pharmaceutical research firm, you need to produce 450.ml of 1.00M potassium phosphate buffer solution of pH = 7.13.
The pKa of H2PO4 is 7.21.
You have the following supplies: 2.00l of 1.00 KH2PO4 stock solution, 1.50 L of 1.00M KH2PO4 stock solution, and a carboy of pure distilled H2O
How much 1.00 M KH2PO4 will you need to make this solution?