Question

The osmotic pressure of 40% (weight/volume) urea solution is 1.64 atm and that of 3.42% (weight/volume) cane sugar is 2.46 atm. When equal volumes of the above two solutions are mixed, the osmotic pressure of the resulting solution is:

• A. 1.64 atm
• B. 2.46 atm
• C. 4.10 atm
• D. 2.05 atm

Answer 1

The correct option is D 2.05 atm

$\pi =\frac{{\pi }_1+{\pi }_2}{2}$

$=\frac{1.64+2.46}{2}$

$=2.05$