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Calculate the pH of ...

[From: ] [author: ] [Date: 12-07-05] [Hit: ]
(Ka for formic acid = 1.A. 2.B. 3.C.......
Calculate the pH of a buffer solution which is 0.20 M in formic acid and 0.15 M in sodium formate.
(Ka for formic acid = 1.8 X 10-4)

A. 2.4 X 10-4
B. 3.62
C. 0.82
D. 8.33

Show steps please

-
Hey again lol...
Use henderson equation:
-log(ka) + log(base/acid)

-log(1.8 x 10^-4) + log(0.15/0.20)
3.744727495 + (-0.124938737) =
3.619788758
1
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