Chemistry - Liquid Solution Question with Solution | TestHub

The chemical formula of potassium ferrocyanide is $K_4[Fe(CN{)}_6]$.

The dissociation reaction is:
$K_4[Fe(CN{)}_6]\rightleftharpoons 4K^{+}+[Fe(CN{)}_6{]}^{4-}$

The number of ions produced per formula unit, $n=5$.

The degree of dissociation, $\alpha =60\%=0.60$.

The van't Hoff factor $i$ is given by:
$i=1+(n-1)\alpha$

Substituting the values:
$i=1+(5-1)\times 0.60$

$i=1+4\times 0.60$

$i=1+2.4=3.4$

Answer: $3.4$