Question

Calculate the COD value of wastewater. A 10ml sample of

water was refluxed with 60ml of K2Cr2O7 solution & after

refluxing the excess unreacted dichromate required 24ml of

0.1N FAS solution. A blank of 10ml of d/w of refluxing with

60ml of dichromate solution required 35ml of 0.1N FAS

Answer 1

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