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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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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 NH3 and acetic acid are equal.