Answer to Question #295801 in Physical Chemistry for Mandeep

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.