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Q.

An aqueous solution of 0.01 M CH3COOH has van't Hoff factor 1.01. If  pH=−log⁡H+, pH of 0.01 M CH3COOH solution would be :

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a

2

b

3

c

4

d

5

answer is C.

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Detailed Solution

Given van't Hoff factor = 1.01. Thus,

1+α=1.01  ⇒α=0.01

For the hydrogen ion,

H+=cα=10−4 

Hence the pH value will be 4.

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An aqueous solution of 0.01 M CH3COOH has van't Hoff factor 1.01. If  pH=−log⁡H+, pH of 0.01 M CH3COOH solution would be :