At 300 K, a one litre solution of sucrose (molecular weight : 342 ) was prepared by dissolving 40 g of sucrose. What is the approximate osmotic pressure (in kPa) of solution at the same temperature ?
`(R = 8.314 xx 10^6 cm^3 Pa K^(-1) mol^(-1))`

Options

A. 292
B. 500
C. 292000
D. 600

Answer

A

Explanation

Osmotic pressure , `pi = CRT`
`(((40)/(1000xx342)))/(1) xx 8.314 xx 10^6 xx 300`
`therefore pi = 291.71 xx 10^3 ~~ 292` kPa