Determine the osmotic pressure of a solution prepared by dissolving `25mg` of `K_(2)SO_(4)` in `2L` of water at `25^(@)C`, assuming that it is completely dissociated.

Explanation

Molar mass of `K_(2)SO_(4)=174" g "mol^(-1)`
`K_(2)SO_(4)to2K^(+)+SO_(4)^(2-)`
No. of ions produced `=3i.e., i=3`
Using relation `pi=iCRT`
`=i(n)/(V)RT=ixx(W)/(M)(RT)/(V)`
`=(3xx0*025xx0*0821xx298)/(174xx2)=5*27xx10^(-3)atm`.