Question

A compound $M{X}_2$ has observed and normal molar masses of 65.6 and 164 respectively. Calculate the apparent degree of dissociation.

• A. $75\%$
• B. $85\%$
• C. $65\%$
• D. $25\%$

Answer 1

The correct option is A $75\%$

$i=\frac{Theo.Mw.}{exp.Mw}$

$=\frac{164}{65.6}=2.5$

$\alpha =\frac{i-1}{n-1}$

$=\frac{2.5-1}{3-1}=0.75$

$\alpha =75\%$