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What is meant by Vant Hoff's factor? The...

 What is meant by Vant Hoff's factor? The Osmotic pressure of 0.0103 molar Solution of an electrolyte is found to be 0.70 atm at 27 C. Calculate the Vant Hoff factor `[R=0.082" liter "mol^(-1) K^(-1)]`.

Text Solution

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Vant Hoff.s factor is the ratio of normal molecular mass to the observed molecular Mass or the ratio of observed colligative property to normal Colligative property It is denoted by ‘i’ = Normal molecular mass/observed molecular mass.
Numerical:pi=iCRT
0.70 = 1 x 0.0103 0.082 (27 +273)
`i=(0.70)/(0.0103xx0.082 xx 300)=2.76 `
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