Question

A solution of sucrose (mol. wt. `342`) is prepared by dissolving `69.3 g` of it per litre of the solution. What is the osmotic pressure at `300 K`?

Answer 1

Correct Answer - 5
`pi V = (w)/(m)ST`
`w = 69.3g`, `m = 342, T = 300K`
`S = 0.0821 "litre atm" K^(-1) mol^(-1)`,
`V = 1 litre`
`pi = (w xx ST)/(V xx m) = (69.3 xx 0.0821 xx 300)/(1 xx 342) ~~5 atm`