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What volume of 0.170 M K3PO4(aq) must be added to 50.3 mL of 0.103 M K2HPO4(aq) to prepare a buffer solution with a pH of 12.09?
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Use the HH equation.
pH = pK3 + log (50.3*0.103)/(0.170*mL)
Solve for mL.
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