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Q.

The degree of dissociation of 10- 3 M ammonium hydroxide $(K_{b}^{\circ} = 1.8 \times 10^{- 5})$ solution is about

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a

0.25

b

0.13

c

0.20

d

0.09

answer is C.

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Detailed Solution

$α ≃ \sqrt{\frac{K_{α}}{c}} = \sqrt{\frac{1.8 \times 10^{- 5} M}{10^{- 3} M}} = 0.134$

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The degree of dissociation of 10- 3 M ammonium hydroxide Kb∘=1.8×10−5 solution is about