0.1 molal aqueous solution of $NaBr$ freezes at $- 0.335℃$ at atmospheric pressure $k_{f}$ for water is $1.86℃$. The percentage of dissociation of the salt in solution is

Question

Dr. Abubacker · Accepted Answer

(b)
$\mathrm{\Delta}T_{f} = ik_{f}m$
$0.335 = i 	imes 1.86 	imes 0.1$
$i = 1.80$
For $NaBr,\ i = 1 + \alpha$
$\alpha = 0.80 = 80\%$

Q. 0.1 molal aqueous solution of $NaBr$ freezes at $- 0.335℃$ at atmospheric pressure $k_{f}$ for water is $1.86℃$. The percentage of dissociation of the salt in solution is

Explanation

Reviewed by Dr. Abubacker

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