A) 7
B) less than 7
C) more than 7
D) zero
Correct Answer: A
Solution :
Given, \[p{{K}_{a}}=4.76\] and \[p{{K}_{b}}=4.76\]pH of salt of weak acid (acetic acid) and weak base (ammonium hydroxide) is \[pH=7+\frac{1}{2}p{{K}_{a}}-\frac{1}{2}p{{K}_{b}}\]\[\Rightarrow pH=7+\frac{1}{2}\times 4.76-\frac{1}{2}\times 4.76=7\] So, the pH of the solution is 7.
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