Determination of ph of acetic acid of 0.1M,0.05M,0.0125M concentration by using quinhydron and calomel electrodes and calculate their degree of dissociation and dissociation constant.
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Standardiza a potentiometer using Weston standard cell.
Construct a cell using Pt electrode (connect it to the+ ve terminal of the potentiometer), calomel (- ve terminal of the potentiometer), using HCl solution as an electrolyte,add small amount of quinhydrone powder & measure the EMF.
calomel/ H2Q,Q,HCl/Pt. ( cell representation)
Repeat the 2nd step for HCl solutions of different concentrations.
Calculate pH using following expression
pH =( E(Q/ H2Q - Ecal - Ecell)/2.303RT/F
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