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03-06-2008, 11:32 AM
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| Buffers in Medicine (a)?
a) As a technician in a large pharmaceutical research firm, you need to produce 150 mL of 1 M potassium phosphate solution of pH = 7.17. The pKa of H_2PO_4^- is 7.21. You have 2 L of 1 M KH_2PO_4 solution and 1.5 L of 1 M K_2HPO_4 solution, as well as a carboy of pure distilled H_2O. How much 1 M KH_2PO_4 will you need to make this solution?
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