0 . 004   M   K 2 SO 4 solution is isotonic with 0 . 01   M glucose solution. Percentage…

Osmotic pressure $\mathrm{\pi }=\mathrm{iCRT}$

$\mathrm{i}=$Van't Hoff Factor

$\mathrm{C}=$Molarity

$\mathrm{R}=$Same gas constant

$\mathrm{T}=$Temperature

For isotonic solutions, osmotic pressure are equal, Hence, we have

$(0.004) \times \mathrm{i} = 0.01$

$\Rightarrow \mathrm{i}=\frac{0.01}{0.004}$

$=\frac{10}{4}=\frac{5}{2}=1+2\alpha$

$2\alpha = 1.5$

$\alpha = 0.75$

$\% \alpha = 75$