Answer to Question #319058 in Physical Chemistry for Sir mencho

Question

In an experiment to determine the transport number of Li+ using the moving boundary methods ,a student used a cell with a Cross sectional area of 0.125cm2 ,when a constant current of 1.8MA was passed for 24.8minutes ,the boundary formed between the two solutions moved a distance of 7.3cm towards the cathode .if 0.01M Licl solution was used as the lead solution, calculate the transport number of Li+ in this solution

Answer 1

There are two experimental techniques for the determination of transport numbers. The Hittorf method is based on measurements of ion concentration changes near the electrodes. The moving boundary method involves measuring the speed of displacement of the boundary between two solutions due to an electric current.