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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