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Question

The van't Hoff factor for 0.1M barium nitrate is 2.74. The percentage of dissociation of barium nitrate is:

A
91.3%
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B
87%
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C
100%
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D
74%
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Solution

The correct option is B 87%
In Ba(NO3)2

n=3 (no. of ions)

Now,
i=1+α(n1)
2.74=1+α(31)
α=1.742
α=0.87
α% =0.87×100
α%=87%

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