The $pH$ of an aqueous solution of $CH_3COONa$ of concentration $C \ M$ is given by:
- A$7 - \frac{1}{2} pK_a - \frac{1}{2} \log C$
- B$\frac{1}{2} pK_w + \frac{1}{2} pK_b + \frac{1}{2} \log C$
- C$\frac{1}{2} pK_w - \frac{1}{2} pK_b - \frac{1}{2} \log C$
- D$\frac{1}{2} pK_w + \frac{1}{2} pK_a + \frac{1}{2} \log C$
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