Backup of experiment 2-chem311 - INTRODUCTION...

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INTRODUCTION I-Objective:- -To determine the transport number of H + and Cl - ions. - To determine the mobilities of the H + and Cl - ions. II-Theory:- The transference number T i of ion i in a solution is defined as the fraction of the electric current carried by that ion. The moving boundary method is one way of measuring T i . ( 29 ( 29 Current = Charge Time = Charge Per Ion Number Of Ions Time × and, Time Length Area ion Concentrat Time Ions Of Number × × = The current carried by ion I is :- t lA i c i z F i I = Where, F= 96487 coulomb/mol. Z i = charge on ion I. C i = molarity of ion i. A= area of the tube. L= average distance which the ions move in time t. If the total current is I , then by the definition of transference number :- T i I i I F z i c i lA It = = and, ( 29 ( 29 T i I I I u u u = + + + - = + + + - The ionic conductivity λ i of an ion is given by:-
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λ i u i F = ------------ (a) and the equivalent conductivity for an ionic solution is the sum of the ionic conductivities:-
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This note was uploaded on 11/07/2010 for the course CHEMICAL E 300 taught by Professor Ahmedghazal during the Spring '10 term at King Fahd University of Petroleum & Minerals.

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Backup of experiment 2-chem311 - INTRODUCTION...

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