Electrochemistry Quiz 2

The cell constant of a conductivity cell is given by

A conductivity cell has two platinum electrodes of area $1.2 \ cm^2$ and 0.92 cm apart. Hence the cell constant is

The conductivity of 0.02 M KI solution is $4.37 \times 10 ^{-4} \Omega ^{-1} \, cm ^{-1}.$ Hence its molar conductivity is :

The specific conductance of 0.02 M HCl is $8.2 \times 10 ^{-3} \, \Omega ^{-1}\, cm ^{-1}.$ Hence its molar conductivity is :

Molar conductivity of an electrolyte is given by,

The units of molar conductivity are

If conductivity is expressed in $\Omega^{-1} \ m^{-1}$ and concentration of the electrolytic solution in mol $m^{-3}$ then, the molar conductance is given by

Kohlrausch’s law is represented as

The degree of dissociation of a weak electrolyte is given by

$\wedge_0$ for $CH_3 COOH$ is $390.7 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ . If $\wedge_0$ for $CH_3 COOK$, and HBr in $\Omega^{-1} \ cm^2 \ mol^{-1}$ are 115 and 430.4 respectively, then $\wedge_0$ for KBr is