What is the pH of a solution that is 0.785 M in acetic acid and 0.451 M is sodium acetate. The Ka for acetic acid is 1.8 x 10-5 .
A. |
4.74 |
|
B. |
4.50 |
|
C. |
4.74 |
|
D. |
4.98 |
|
E. |
5.50 |
Ka = 1.8 * 10^-5
PKa = -log(Ka)
= -log(1.8 * 10^-5)
= 4.74
Ph = Pka + log (Salt /Acid)
Ph = 4.74 + log(0.451 / 0.785)
= 4.74 + log(0.574)
= 4.74 - 0.24
= 4.50
Correct answer :- B
What is the pH of a solution that is 0.785 M in acetic acid and 0.451...
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