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WHAT METHOD CAN BE USED TO PREPARE 0.2M POTASSIUM PHOSPHATE BUFFER USING KH2PO4 AND KOH?

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H2PO4^- + OH^- ==> H2O + HPO4^-2

Weigh an appropriate amount of KH2PO4, add an appropriate amount of KOH. You find appropriate amounts by using the Henderson-Hasselbalch equation.

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