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Discuss the comparison between Raoult's law and Henry's law. |
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Answer» Solution :According to Raoult's LAW for solution containing a NONVOLATILE solute ` P_("solute ") =P^(@) _("solute ")X_("solute ") ` According to Henry's law " ` P_("solute ")=K_Hx_("solute in solution") ` The difference between the above two expressions is the proportionality CONSTANT `p^(@) _A ` (Raoult's Law ) and ` K_H ` (Henry ' s Law ) Henry 's law is applicable to solution containing gaseous solute in liquid solvent while the Roult's law is applicable to nonvolatile solid in a liquid solvent . If the solute is NON volatile then the Henry's law constnat will become equal to the vapour of the pure solvent `(P_A^(@) ) ` and thus Raoult's law becomes a special case of Henry 's law For very dilute solutionsthe solvent obeys Raoult's law and the solute obeys Henry 's law . |
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