Question
The percentage dissociation of a salt $\left(\mathrm{MX}_{3}\right)$ solution at given temperature (van't Hoff factor $\mathrm{i}=$ $2)$ is. __________ % (Nearest integer)
✓
Answer
33
$\mathrm{MX}_{3} \rightarrow \mathrm{M}^{+3}+3 \mathrm{X}^{\ominus}$
$\mathrm{i}=1+(\mathrm{n}-1) \alpha$
$\mathrm{i}=1+(4-1) \alpha=2$
$\alpha=\frac{1}{3}=33.33 \% \approx 33 \%$
$\mathrm{MX}_{3} \rightarrow \mathrm{M}^{+3}+3 \mathrm{X}^{\ominus}$
$\mathrm{i}=1+(\mathrm{n}-1) \alpha$
$\mathrm{i}=1+(4-1) \alpha=2$
$\alpha=\frac{1}{3}=33.33 \% \approx 33 \%$
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