1.

The avrage osmotic presure of human of blood is 7.8 bar at 27^(@)C. The concentration of an aqueous NaCI solution that could be used in the blood stream is :

Answer»

0.16 mol/litre
0.32 mol/litre
0.60 mol/litre
0.45 mol/litre

Solution :According to Van't Hoff equation
`pi=iCRT or C=pi/(iRt)`
For NaCI,i=2,pi=7.8 bar=7.8 ATM.
R=.0821 L-atm `K^(-1)mol^(-1),T=27^(@)C=300` K
`C=((7.8atm))/(2(0.0821 L-atm K^(-1)mol^9-1)xx300K)=0.16 mol L^(-1)`


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