The `pH` of a dilute solution of acetic acid wea found to be `4.3`. The addition of a small crystal of sodium acetate will cause `pH` to

Options

A. become less than 4.3
B. become more than 4.3
C. remain equal to 4.3
D. unpredictable

Answer

B

Explanation

`CH_(3)COONa` being strong electrolte ionises into `CH_(3)COO^(-)` and `Na^(+)` ions and it supresses the ionisation of `CH_(3)COOH`
`(CH_(3)COO^(-) hArr CH_(3)COO^(-)+H^(+))`
thereby decreasing the `H^(+)` ion concentration . This would cause pH to increase beyond 4.3