When the following is added to `20 ml` of `0.1 M CH_(3)COOH + 20 ml 0.1 M` of `CH_(3)COONa`. The `pH` of the solution does not change

Options

A. `10mL` of `0.1 M CH_(3)COOH`
B. `10 mL` of `0.1 M CH_(3)COONa`
C. `10 mL` of water
D. `20 mL` of `0.2 M CH_(3)COOH`

Answer

C

Explanation

`pH = pka + "log" ([S])/([A])`
pH of buffe depends upon the ka, `["Salt"]` and `["Acid"]`