Grade 12th passInorganic Chemistry
500 ml of a sample C.O.D of water required 19.6 mg of K2Cr2O7 of water sample is
500 ml of a sample C.O.D of water required 19.6 mg of K2Cr2O7 of water sample is
2 Answers
Sakshi
Hey Student..
Can you please ask the question in little more detail as your doubt is not pretty much clear to me..
Can you please ask the question in little more detail as your doubt is not pretty much clear to me..
Rajasekhara Reddy
no of gr eq of dichromate reacts is equal to no of gr eq of O2 demand.
( 19.2 *2/294.2/6) = ( wt/ 8)
wt of O2 demand = 6.4 mg /lit
ppm = 6.4
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