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History of the word copperas - Chemistry Stack Exchange I searched for copperas on google and it says ferrous sulphate My dictionary shows that the word copperas is derived from copper I was just wondering what has ferrous sulphate to do with copper
Coagulation with Ferric Chloride - Chemistry Stack Exchange I'm having a hard time understanding the use of coagulation wastewater treatment I have read in literature that ferric chloride is used as a coagulant to remove COD, TSS and ammonia from landfill