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Derive the relationship between the elevation of boiling point and molar mass of non-volatile solute. |
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Answer» Solution :`P _("solution") prop x_(A)` by Raoult.s law where `x _(A)` is the mole fraction of the solvent ` P _("solution") = k x_(A)` `p _("solvent"_^(0)=` partial pressure of pure solvent. `P _("solution")=` partial pressure of pure solvent. `P_("solution") = P_("solvent")^(0) x _(A)` `(P _("solution"))/(P _("solvent")^(0)) =x_(A)` ` 1- (P _("solution")/(P _("solvent")^(0)) =1-x_(A)` `THEREFORE (P_("solvent"^(0) -P_("solution"))/(P_(solvent"^(0))=x _(B)` where ` x _(B)=` mole fraction of the SOLUTE `x _(A) + x _(B) =1` `therefore x _(B) =1-x_(A)` `(P ^(@) -P)/(P^(@)) =x_(B)` |
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