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Abnormal Colligative Properties

q-An aqueous ...

Question

q-An aqueous solution of urea (NH2CONH2) is 3.0 molal. find out the mole fraction of the urea
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Solution

$X_{2} = \frac{m M_{1}}{1 + m M_{1}} X_{2} - m o l e f r a c t i o n o f t h e s o l u t e m - m o l a l i t y M_{1} - m o l e c u l a r m a s s o f t h e s o l v e n t (w a t e r = 18) X_{2} = \frac{3 \times 18}{1 + 3 \times 18} = 0.9818$

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