how does the iron (III) chloride test work
When dissolved in water, iron(III) chloride undergoes hydrolysis and gives off heat in an exothermic reaction. The resulting brown, acidic, and corrosive solution is used as a flocculant in sewage treatment and drinking water production, and as an etchant for copper-based metals in printed circuit boards.ron(III) chloride hexahydrate consists of trans -[Fe(H 2 O) 4 Cl 2 ] + cationic complexes and chloride anions, with the remaining two H 2 O molecules embedded within the monoclinic crystal structure. Iron(III) chloride has a relatively low melting point and boils at around 315 Â°C.