Содержание
- 2. I R O N Its density is 7.87 g/cm3 Melting point is 1538 oC Boiling point
- 3. Occurrence of iron Iron is second most abundant metal (6%) in the earth’s crust. But it
- 4. Preparation of Iron In the laboratory 1. H2 gas is added to iron oxide Fe2O3 +
- 5. Chemical Properties of Iron Iron has 26Fe: [18Ar]4s23d6 electron configuration In compounds, iron takes +2 and
- 6. Reactions of Iron 1) Iron reacts with dilute solutions of strong acids. Fe + 2HCl →
- 7. 2) Iron produces mixed oxides by water 3Fe + 4 H2O →Fe3O4 + 4H2 3) When
- 8. 4) At high temperature, it reacts with halogens. 2Fe(s) + 3Cl2(g) 1200°C 2FeCl3(s) Moisture and oxygen
- 9. Uses Iron is useful in our society today because iron is virtually used in everything :
- 10. IMPORTANT COMPOUNDS OF IRON Iron has +2 and +3 oxidation states in its compounds. Fe2+ ion
- 11. Iron (II) compounds (Ferro Compounds) 1. Iron (II) chloride, FeCl2 It is obtained by passing hydrogen
- 12. 2. Iron (II) oxide, FeO This compound is produced by decomposition of iron (II) oxalate. FeC2O4
- 13. Iron (III) Compounds (Ferric Compounds) 1. Iron(III) chloride, FeCl3 When iron is reacted with chlorine gas,
- 14. 2. Iron (III) hydroxide, Fe(OH)3 It is obtained by the reaction of Fe3+ with a base
- 15. 3. Iron (III) oxide, Fe2O3 In nature Fe2O3 is found in hematite and limonite minerals. It
- 16. Iron(II, III) oxide, Fe3O4 Fe3O4, mixed oxide, is obtained by passing heated steam over iron metal
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