When a salt of a weak acid and a weak base is | vedclass

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(D) For a salt of a weak acid and a weak base,the $pH$ of the solution is given by the formula:$pH = \frac{1}{2} [pK_w + pK_a - pK_b]$Here,$pK_w = 14$

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depend upon $K_a$ and $K_b$ values

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(D) For a salt of a weak acid and a weak base,the $pH$ of the solution is given by the formula:$pH = \frac{1}{2} [pK_w + pK_a - pK_b]$Here,$pK_w = 14$ at $25\,^{\circ}C$.If $K_a = K_b$ (i.e.,$pK_a = pK_b$),then $pH = \frac{1}{2} [14 + 0] = 7$.If $K_a > K_b$ (i.e.,$pK_a If $K_a  pK_b$),then $pH > 7$.Since the $pH$ depends on the relative values of $K_a$ and $K_b$,the $pH$ will depend upon $K_a$ and $K_b$ values.

When a salt of a weak acid and a weak base is dissolved in water at $25\,^{\circ}C$,the $pH$ of the resulting solution will always

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