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Derive the relation between relative lowering of vapour pressure and molar mass of solute.

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What is relative lowering of vapour pressure ?

What is relative lowering of vapour pressure ?

Knowledge Check

  • The relative lowering of vapour pressure is equal to

    A
    Ratio of the number solute molecules to the totalnumber of molecules in solution
    B
    Ratio of the number of solvent molecules to the number of solute molecules
    C
    Ratio of the number of solute molecules to the number of solvent molecules
    D
    Ratio of the number of solvent molecules to the total number of molecules in solution

  • Relative lowering of vapour pressure is maximum for

    A
    0.1 m urea
    B
    0.1 m NaCl
    C
    0.1 m `MgCl_2`
    D
    0.1 m `Al_2(SO_4)_3`

  • Which has greater lowering of vapour pressure

    A
    0.1m Urea
    B
    0.1m Glucose
    C
    0.1m Sucrose
    D
    equal in all cases

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    Calculate the relative lowering of vapour pressure of a 10% aqeous caustic soda solution.

    When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Lowering in vapour pressure in an experiment was found to be x mm of Hg. It is : Lowering in vapour pressure in an experiment was found to be x mm of Hg. It is

    When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Relative lowering in vapour pressure :

    When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Which of the following relation /statements is correct?

    At a given temperature (a) Vapour pressure of a solution containing nonvolatile solute is proportional to mole fraction of solvent (b) Lowering of vapour pressure of solution containing nonvolatile solute is proportional to mole fraction of solute (c) Relative lowering of vapour pressure is equal to mole fraction of solute

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