Question

A 1 molal solution of trichlorosacetic acid (CCl₃COOH) is heated to its boiling point. The solution has a boiling point of 100.18°C. Determine the Van’t Hoff factor for CCl₃COOH. ($K_b$ = 0.512 K kg mol⁻¹)

Answer 1

The answer will be 0.351.
So, trichloroacetic acid shows dissociation.

Answer 2

m=1 m

Tb= 100.18°C

T°b= 100°C

i=?

/\ Tb= 0.18°C

/\Tb= kb×i×m

0.18= 0.512K×i×1

0.18/0.512 =i

i= 0.35.

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