On combining which of the following anions wi | vedclass

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(A) The $pH$ of a salt solution formed by a weak base $(NH_4OH)$ and a weak acid $(CH_3COOH)$ is given by the formula: $pH = \frac{1}{2}pK_w + \frac{1

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$CH_3COO^{\ominus}$

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(A) The $pH$ of a salt solution formed by a weak base $(NH_4OH)$ and a weak acid $(CH_3COOH)$ is given by the formula: $pH = \frac{1}{2}pK_w + \frac{1}{2}pK_a - \frac{1}{2}pK_b$. This formula shows that the $pH$ is independent of the concentration of the salt. For other options like $NH_4Cl$,$NH_4NO_3$,and $(NH_4)_2SO_4$,the salts are formed from a weak base and a strong acid. The $pH$ of such salts is given by $pH = \frac{1}{2}(pK_w - pK_b - \log C)$,which depends on the concentration $C$. Therefore,the correct anion is $CH_3COO^{\ominus}$.

On combining which of the following anions with $NH_4^{\oplus}$ will the $pH$ of the resulting salt solution be independent of the concentration?

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