Question

What is transport number of an iron. How it is related to ionic mobility. Explain hittor'f method for determing transport number of an iron.

Answer 1

Ion transport number is the fraction of the total electric current carried in an electrolyte by a given ionic species.

$t_i=\frac{I_i}{I_{TOTAL}}$

Electric mobility affect the transport number.

Ions that move faster have higher transport number.

The Hittorf method is based on measurements of ion concentration changes near the electrodes in an a electrolytic cell due to passage of unknown amount of electricity.