Question

the number of mole of k2cr2o7 required to oxidise 0.2 mol of h2s in acidic medium is​

Answer 1

Answer:

0.06 moles of K2Cr2O7 is required

Answer 2

HELLO DEAR,

ANSWER:-

The balanced chemical equation for the reaction between potassium dichromate and hydrogen sulfide is as given below

K2Cr2O7 + 4H2SO4 + 3H2S -------> K2SO4 + Cr2(SO4)3 + 7H2O + 3 S.

1 mole of potassium dichromate reacts with 3 moles of hydrogen sulphide.

Hence ,the number of moles of potassium dichromate ( K2Cr2O7)

that will be needed to react 0.2 moles of H2S in acidic medium is 0.2/3 moles.

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THANKS.