Posted by Jenn on Friday, February 10, 2012 at 3:28pm.
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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