1.

Calculate the osmotic pressure os potassium ferrocyanide solution whose 0.1M aqueous solution dissociates to 45% at 298 K.

Answer»


Solution :STEP I. Calculation of Van't Hoff factor (i)
`K_(4)[FE(CN)_(6)]to 4K^(+)+[Fe(CN)_(6)]^(4-)`
`alpha=(i-1)/(n-1)=,0.45=(i-1)/(5-1)=(i-1)/4or i=0.45xx4+1=2.8`
Step II. `"Calculation of osmotic pressure "(PI)`
`pi=I CRt`
`pi=(2.8)xx(0.1" MOL L"^(-1))xx(0.0821" L atm K"^(-1)mol^(-1))xx(298 K)=6.85 "atm".`


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