By Sunil Bhardwaj

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D. Ilkovic performed the number of the experiments on Polarography. In each case, he observed the applied potential and current obtained in galvanometer. In each case, he plotted graph of current V/S applied potential and from graph he calculated id He said if id is known to us we can find out the concentration of experimental solution i.e. quantitative analysis is possible. $$ { i }_{ d } = 607n{ D }^{ 1/2 }{ m }^{ 2/3 }{ t }^{ 1/6 } C $$ \(n =\) Valency of metal
\(D =\) Diffusion coefficient which is constant.
\(m =\) rate of fall of Hg in \(g/sec\).
\(C =\) conc. of electrolyte in \(milli\ moles/{ dm }^{ 3 }\)
\(t =\) average time of fall of Hg drop.
\({ i }_{ d } =\) Diffusion current in \(\mu A\) (micro ampere)
As D depends on temp therefore id depends on temperature.

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