Question

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to :-

Options

• Increase in ionic mobility of ions

• 100% ionisation of electro unit at normal decoration

• Increase in both the number of ions and ionic mobility of ions

• Increase in no. of ions

Answer 1

Increase in ionic mobility of ions

Explanation:

`lambda_(eq) = k xx V = (k xx 1000)/"Normality"`

On dilution, the number of current carrying particles per cm³ decreases but the volume of solution increases.

Consequently, the ionic mobility increases, which in turn increases the equivalent conductance of strong electrolyte.