Define ionic mobility. Explain the factors affecting ionic mobility. How is it related to transport number?

The aerage velocity with which a given ion drifts through a specified gas under the influence of electric field is called ionic mobility. Factors that affect ionic mobility are: Temperature, Nature of electrolyte and size of ion. Relation between ionic mobility and transportation number: λa or λc = ta or tc × λ ∞ Where λa or λc are ionic mobilities