The diffusion current for a standard is 1 x 10^-4M solution of

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The diffusion current for a standard is 1 x 10^-4M solution of hydroquinone is 17.5 microamperes. An unknown solution of hydroquinone, when diluted hundred folds and polarographed under same conditions yielded a current of 30.5 microamperes. Calculate the concentration of hydroquinone in the unknown sample.

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