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The chemical composition of Chlorinated Copperas is __________

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The chemical composition of Chlorinated Copperas is __________

(a) Fe2 (SO4)3 + FeCl3

(b) FeSO4.9H2O

(c) FeSO4.18H2O

(d) Fe2 (SO4)3

This question was posed to me during a job interview.

This interesting question is from Sedimentation with Coagulation in chapter Sedimentation of Environmental Engineering

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Right answer is (a) Fe2 (SO4)3 + FeCl3

The best explanation: 6FeSO4.7H2O2 +3Cl2 = 2Fe2(SO4) 3 + 2FeCl3 + 7H2O

The ferric sulfate and ferric chloride so formed are called as Chlorinated Copperas.

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