Posted by Daniel on Sunday, March 7, 2010 at 1:15am.
I would determine the molarity of each component.
moles NaCl = M x L
moles HCl = M x L.
moles HNO3 = M x L.
moles NaOAc = M x L.
Then M = moles/L.
for NaCl that will be 0.0375/1 L = ??
Likewise for the others.
Finally, add the two H^+ from HCl and HNO3 to obtain total H^+.
Then H^+ + OAc^- ==> HOAc
You know H^+, you know OAc^-, that makes HOAc and leaves some Ac^- un-reacted. Then use Ka expression or the Henderson-Hasselbalch equation to solve for pH.
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