Question

100 mL aqueous solution of glucose with osmotic pressure 1.2 atm at `25^(@)C` is mixed with 300 mL aqueous solution of urea at 2.4 atm at `25^(@)C`. Calculate the osmotic pressure of mixture.

Answer 1

Correct Answer - 1.68 atm
Use : `pi_(1)V_(1)+pi_(2)V_(2)=pi_(R)(V_(1)+V_(2))`
`pi_(R)=(pi_(1)V_(1)+pi_(2)V_(2))/(V_(1)+V_(2))`
`=(1.2xx100+2.4xx300)/(500)=1.68 "atm"`]