There is a buffer solution containing 0.50 M acetic acid (CH3COOH, Ka= 1.8 X 10-5) and 0.50 M sodium acetate (CH3COONa). Calculate the pH of this solution. CH3COOH(aq) ↔ H+(aq) ↔ CH3COO-(aq) early 0.50 ~ 0 0.50 change - x + x + x equilibrium 0.50 - x x 0.50 +
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There is a buffer solution containing 0.50 M acetic acid (CH3COOH, Ka= 1.8 X 10-5) and 0.50 M sodium acetate (CH3COONa). Calculate the pH of this solution.
|
|
CH3COOH(aq) |
↔ |
H+(aq) |
↔ |
CH3COO-(aq) |
|
early |
0.50 |
|
~ 0 |
|
0.50 |
|
change |
- x |
|
+ x |
|
+ x |
|
equilibrium |
0.50 - x |
|
x |
|
0.50 + x |
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