An aqueous solution of `2` per cent `(wt.//wt)` non-volatile solute exerts a pressure of `1.004` bar at the boiling point of the solvent. What is the molecular mass of the solute?

An aqueous solution of `2` per cent `(wt.//wt)` non-volatile solute ex

1.	An aqueous solution of `2` per cent `(wt.//wt)` non-volatile solute exerts a pressure of `1.004` bar at the boiling point of the solvent. What is the molecular mass of the solute?
Answer» `P^(@)A=1atm=1.013"bar", Ps =1.004"bar"` `W_(B)=2g" "W_(s)=100g//mol " "W_(A)=98g` `(P^(@)A-PS)/(P^(@)A)=X_(B)" "implies" "(P^(@)A-PA)/(P^(@)A)~(nB)/(nA)` `(1.013-1.004)/(1.013)=(2)/(M_(B))xx18/98impliesM_(B)=(2xx18)/(98)xx(1.013)/(0.009)` ` thereforeM_(B)=41.35g//mol`

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An aqueous solution of `2` per cent `(wt.//wt)` non-volatile solute exerts a pressure of `1.004` bar at the boiling point of the solvent. What is the molecular mass of the solute?

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