First slide

Theory of dilute solutions

Question

From a measurement of the freezing point depression of benzene, the molecular weight of acetic acid in a benzene solution was determined to be 100. The percentage association of acetic acid is

Moderate

A

79%
B

93%
C

80%
D

100%

Solution

$i = \frac{60}{100} = 1 - \frac{α}{2} \Rightarrow α = 80 %$

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