Transport number of charge-transfer complexes in solution

Abstract

Iodine which is generally a non-conductor in non-polar solvents, conducts electricity in methanol, ethanol and water. The majority of the charge carriers in the solutions of charge-transfer complexes of methanol—iodine and ethanol—iodine are anion constituents ( t 25°C − are 0.739, 0.728 for 0.1 N solution of iodine in methanol and ethanol respectively) and for water—iodine it is cation constituents ( t 25°C + is 0.905 for 0.0024 N iodine). The transport number of anion decreases with the increase in temperature whereas it increases with the increase in concentration at 25°C.