Experiment 6
OBJECT
To determine the dissociation constant of acetic acid and verify Ostwald’s dilution law.
APPARATUS AND REAGENTS
Conductometer, burette, pipette, beaker, volumetric flask (100 ml), acetic acid, conductivity water.
THEORY
Suppose a weak electrolyte AB dissociates in V litre of solution with initial concentration of one mole per litre. At equilibrium, its concentration will be as under:
where a is degree of dissociation.
On applying the law of mass action, we get
where K is the dissociation constant of the substance. ...
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