In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionisation is 0.3 Taking $k_{f}$ for water as 1.85, the freezing point of the solution will be nearest to

Question

Dr. Abubacker · Accepted Answer

(a)
Given, m=0.2
$k_{f} = 1.85\ \ \ \$
$\alpha = 0.3\ \$
$	herefore$ i=1+$\alpha$=1.3
$\mathrm{\Delta}T_{f} = molality\  	imes k_{f} 	imes i$
=0.2$	imes 1.85 	imes 1.3$
=0.481${^\circ}$
$	herefore$ freezing point =-0.481$℃$

Q. In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionisation is 0.3 Taking $k_{f}$ for water as 1.85, the freezing point of the solution will be nearest to

Explanation

Reviewed by Dr. Abubacker

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