Question

A solute a dimerizes in water. The boiling point of a 2 molar solution of A is 100.52ºC. The percentage association of A is .........

(Round off to the Nearest integer)

[Use : K_b for water = 0.52 K kg mol^–1

Boiling point of water = 100°C]

Answer 1

ΔT_b = T_b – T_b⁰ 

100.52 – 100

= 0.52ºC

α = 1

So, percentage association = 100%

Comments

Why we didn't change the 0.52 celcius into kelvin

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Because change in temperature in celcius scale is equal to the change in temperature in Kelvin scale. it means

ΔT in celcius scale  = ΔT in Kelvin scale