As a technician in a large pharmaceutical research firm, you need to produce 150. mLof a potassium dihydrogen phosphate buffer solution of pH = 7.09. The pKa of H2PO4â is 7.21.

You have the following supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 L of 1.00 M K2HPO4 stock solution, and a carboy of pure distilled H2O.

How much 1.00 M KH2PO4 will you need to make this solution? (Assume additive volumes.)

Answer in mL or L.

Question

As a technician in a large pharmaceutical research firm, you need to produce 150. mLof a potassium dihydrogen phosphate buffer solution of pH = 7.09. The pKa of H2PO4â is 7.21.

You have the following supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 L of 1.00 M K2HPO4 stock solution, and a carboy of pure distilled H2O.

How much 1.00 M KH2PO4 will you need to make this solution? (Assume additive volumes.)

Answer in mL or L.

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