Given a solution that contains 0.100 M NH4C2H3OO, 0.0010 M Oxalic acid, and 0.00010 M KHP (all formal concentrations), what is the pH of this solution?
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Answer:
Using Henderson's equation,
pH=pK
a
+log
[Acid]
[Salt]
pH=5−log(8)+log
[0.4]
[0.2]
=4.44
So [H
+
]=3.6×10
−5
M
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