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Q.

What would be the pH of an ammonia solution if that of an acetic acid solution of equal strength is 3.2? Assume dissociation constant for ${NH}_{3}$ and acetic acid are equal.

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a

3.2

b

10.8

c

11.2

d

9.6

answer is D.

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Detailed Solution

pH of $ACOH$ solution = $pOH$ of ${NH}_{3}$ solution

${pH}_{(A C OH)} = {pH}_{({NH}_{3})} = 3.2 {pH}_{({NH}_{3})} = 14 - 3.2 \Rightarrow {pH}_{{NH}_{3}} = 10.8$

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