A decimolar solution of potassium ferrocyanide is `50%` dissociated at `300K`. Calculate osmotic pressure of the solution. (Given `S = 8.341 JK^(-1) mol^(-1)`)

Answer

`7.389` atm

Explanation

`C=(1)/(10)M,K_(4)[Fe(CN)_(6)]`rarr4K^(+)+[Fe(CN)_(6)]^(4-)`
`n=5, alpha=(i-1)/(n-1) rArr 0.5=(i-1)/(5-1), i=3`.
`pi=iCRT=3xx(1)/(10)xx0.0821xx300=(78.39)/(10)=7.389` atm.