Question

The equivalent conductance of 0.1 H2SO4offering a resistance of 50ohms when placed in a conductivity cell whose electrodes are 1cm apart with a cross-sectional area of 2cm^2 at 25^0C is?

(a) 100 S cm^2 eq^-1

(b) 1000 S cm^2 eq^-1

(c) 10 S cm^2 eq^-1

(d) 1 S cm^2 eq^-1

This question was posed to me in exam.

The above asked question is from Conductivity in chapter Criteria of Purity and Characterisation of Materials of Engineering Chemistry I

Answer 1

The correct choice is (a) 100 S cm^2 eq^-1

The best I can explain: The equivalent molar conductance is 100 S cm^2 eq^-1.

Conductivity = Conductance * cell constant

Cell constant = Length / Area