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Define conductivity and molar conductivi...

Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.

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### Step-by-Step Text Solution: **Step 1: Define Conductivity** Conductivity (κ) is defined as the ability of an electrolytic solution to conduct electric current. It is the total conductance provided by the electrolytic solution present between two electrode plates. Mathematically, it can be expressed as: \[ \kappa = \frac{G \cdot d}{A} \] ...
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(a) Define the terms conductivity and molar conductivity for the solution of an electrolyte. Comment on their variation with temperature (b) The measured resistance of a conductance cell was 100 ohms. Calculate (i) the specific conductance and (ii) the molar conductance of the solution (KCl=74.5 g mol^(-1) and cell constant =1.25 cm^(-1))

Define molar conductance

Knowledge Check

  • Limiting molar conductivity of NaBr is

    A
    `Lambda_m^@NaBr = Lambda_m^@NaCl + Lambda_m^@KBr`
    B
    `Lambda_m^@NaBr = Lambda_m^@ NaCl + Lambda_m^@KBr - Lambda_m^@KCl`
    C
    `Lambda_m^@NaBr=Lambda_m^@NaOH + Lambda_m^@NaBr - Lambda_m^@NaCl`
    D
    `Lambda_m^@NaBr=Lambda_m^@NaCl-Lambda_m^@NaBr`

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    At 0.04 M concentration the molar conductivity of a solution of a electrolyte is 5000Omega^(-1)cm^(2)mol^(-1) while at 0.01 M concentration the value is 5100Omega^(-1)cm^(2)mol^(-1) making necessary assumption (taking it as strong electrolyte) find the molar conductivity at infinite dilution and also determine the degree of dissociation of strong electrolyte at 0.04M.

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