By Sunil Bhardwaj


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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