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Q.
Aqueous solution of $0.004 \, \text{M}$ $Na_{2}SO_{4}$ and $0.01 \, \text{M}$ glucose are isotonic. The percentage degree of dissociation of $Na_{2}SO_{4}$ is
NTA AbhyasNTA Abhyas 2022
Solution:
For two solutions to be isotonic.
$
i \times \pi_{ Na _2} SO _4=\pi_{\text {Glucose }}
$
$
(1+2 \alpha) C_1 R T=C_2 R T
$
$
(1+2 \alpha) \times 0.004=0.01
$
$
\alpha=0.75 \text { or } 75 \%
$