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March 28, 2017

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Calculate pH when 0.060 mols of HCl are added to 1.000 L of a buffer containing 0.499M KH2PO4 and 0.193M K2HPO4

  • Chemistry - ,

    Use the Henderson-Hasselbalch equation and the ICE chart below.
    moles HPO4^2- = 0.193
    moles H2PO4^- = 0.499

    ...........HPO4^2- + H^+ ==> H2PO4^-
    initial....0.193......0.......0.499
    add..................0.06...............chchange.....-0.06.....0.06......+0.06
    equil.......0.133......0........0.493

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