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Molar conductivity....

Molar conductivity.

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It is defined as a conductance of a volume of the solution containing ions from one mole of an electrolyte when placed between two parallel plate electrodes 1 cm apart and lf large area, sufficient to accommodate the whole solution between them, at constant temperature. It is denoted by `^^_(m)`.
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Write relation between electrolytic conductivity and molar conductivity. Calculate molar conductivity at zero concentration for CaCl_(2) and NaCl. Given: molar ionic conductivities of Ca^(2+), Cl^(-), Na^(+) ions are respectively, 104, 76.4, 50.1 Omega^(-1)cm^(-2)mol^(-1)

Factors Affecting Electrical Conductivity Of Electrolytic Solutions|Ohm's Law|Resistance |Resistivity Or Specific Resistance|Conductance|Conductivity|Molar Conductivity |Relation Between Conductivity And Molar Conductivity |Summary

Knowledge Check

  • Statement-1: Specific conductivity of an electrolytic solution decreases with dilution whereas molar conductivity. Statement-2: Specific conductivity is the conductance of a specific amount of the electrolyte whereas molar conductivity is for 1 mole of the electrolyte.

    A
    Statement-1 is True, statement-2 is true, statement-2 is a correct explanation of statement-1
    B
    Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation of statement-1.
    C
    Statement-1 is true, statemet-2 is false
    D
    Statement-1 is false, statement-2 is true

  • The molar conductance is given by the relation (M = concentration in molarity)

    A
    `Lambda_(m) = 1000(k)/(M)`
    B
    `Lambda_(m) = 1000(M)/(k)`
    C
    `Lambda_(m) = 1000 kM`
    D
    `Lambda_(m) = 1000 (k)/(M^(2))`

  • At infinite dilution, the contribution of cation and anion to the molar conductance is ___________.

    A
    dependent on each other
    B
    independent of each other
    C
    dependent on the nature of the solvent
    D
    dependent on the cell

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    (a) State the law which helps to determine the limiting molar conductivity of weak electrolytes. (b) Calculate limiting molar conductivity of CaSO^4 (limiting molar conductivity of calcium and sulphate ions are 119.0 and 106.0 S cm^2 mol^(-1) respectively).

    Molar conductance and Conductivity Questions

    Effect of Dilution on Conductivity and Molar Conductance

    (a) Apply Kohlrausch law of independent migration of ions, write the expression to determine the limiting molar conductivity of calcium chloride. (b) Given are the conductivity and molar conductivity of NaCI solutions at 298 K at different concentrations : Compare the variation of conductivity and molar conductivity of NaCI solutions on dilution. Give reason. (c) 0.1 M KCI solution offered a resistance of 100 ohms in conductivity cell at 298 K. If the cell constant of the cell is 1.29 cm^(-1) , calculate the molar conductivity of KCI solution.

    Molar conductance of electrolytic solution wedge_(m) is

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