SolutionHard
Question
The osmotic coe cient of a non-electrolyte is related to the freezing point depression by the expression, $\phi = \Delta T_{f}/\left( m.K_{f} \right)$. The depression in freezing point of 0.4 molal aqueous solution of sucrose is 0.93°C. The osmotic coe cient is (Kf of water = 1.86 K-kg/mol)
Options
A.0.8
B.1.0
C.1.25
D.0.125
Solution
$\phi = \frac{\Delta T_{f}}{K_{f}.m} = \frac{0.93}{1.86 \times 0.4} = 1.25$
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