A buffer solution of `pH` value `4` is to be prepared, using `CH_(3)COOH` and `CH_(3)COONa`.How much amount of sodium acetate is to be added to `1.0L` of `M//10` acetic acid? `(K_(a) = 2.0 xx 10^(-5))`

Explanation

To prepare a buffer solution with a pH of 4 using acetic acid (CH₃COOH) and sodium acetate (CH₃COONa), we can use the Henderson-Hasselbalch equation:

\[ \text{pH} = \text{pK}_a + \log\left(\frac{[\text{Salt}]}{[\text{Acid}]}\right) \]

### Step 1: Calculate pKₐ
First, we need to calculate the pKₐ from the given Kₐ value of acetic acid.
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