Consider separate solutions of `0.500 M C_(2)H_(5)OH(aq)`,`0.100 M Mg_(3)(PO_(4))(aq)`,`0.250 M KBr(aq)`, and `0.125 M Na_(3)PO_(4)(aq)` at `25^(@)C`. Which statement is true about these solutions, assuming all salts to be strong electrolytes?

Options

A. `0.125 M Na_(3)PO_(4)(aq)` has the highest osmotic pressure
B. `0.500 M C_(2)H_(5)OH(aq)` has the highest osmotic pressure
C. They all have the same osmotic pressure
D. `0.100M Mg_(3)(PO_(4))_(2)(aq)` has the highest osmotic pressure

Answer

C

Explanation

`pi =iCRT`
`|{:(S.No .,"Electrolyte",i,C,ixxC),(1,C_(2)H_(6)OH,1,0.5M,0.5),(2,Mg_(3)(PO_(4))_(2),5,0.1M,0.5),(3,KBr,2,0.25M,0.5),(4,Na_(3)PO_(4),4,0.125M,0.5):}:|`
`:.` all have same osmotic pressure