What property is exhibited in each case when the following changes occur on exposure to air?
i. Fey converted to Fe₂O³.xH₂O
ii. FeCl converted to FeCl
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Rusting / Oxidation of iron is exhibited :
Explanation:
i) When Fe is converted to , it is called rusting of iron. Rust is basically iron oxide which is reddish-brown in color . This iron oxide is formed by the reaction of iron and oxygen in presence of water or air or moisture. Rust is made up of hydrated iron(III) oxides . The property exhibited here can also be oxidation of iron.
ii) Conversion of Fe to is also an oxidation process. Metallic iron when reacts with dil HCl produces only ferrous chloride. Heating iron with chlorine gas results in the formation of ferric chloride , . This also is oxidation , where acts as an oxidant and oxidation of to takes place.
- is quite sensitive to air. A solution of when exposed to air turns cloudy , again because of oxidation of Fe(2+) and results in the formation of basic Fe(3+) compounds.
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