Question

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to:
A. increase in number of ions
B. increase in the ionic mobility of ions
C. 100% ionisation of the electrolyte at normal dilution
D. increase in both i.e. number of ions and ionic mobility of ions.

Answer 1

Correct Answer - B
Strong electrolyte is completely ionized at all concentrations . Therefore, the number of ions remains the same on dilution. However on dilution. The interionic forces decrease. Consequently the ionic mobility increases. Hence the equivalent conductance increases.