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A 100.0 mL of 10.0 mM phosphate buffer, pH 7.5 (pka2 = 7.2). You are provided with 0.200 M KOH and 0.100 M KH2PO4 solutions, Calculate volume of KOH and KH2PO4 solutions. (Hint: Determine the mole ratio of the salt (K2HPO4) and acid (KH2PO4) using buffer equation, then calculate the volume of KOH and KH2PO4 required using moles = volume x molarity. Please also note that K2HPO4 is formed by mixing KOH and KH2PO4 toghether.

KOH + KH2PO4 --> K2HPO4

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