Reaction with water
Iron virtually has no reaction with cold water.
Iron reacts with steam to give iron oxide and hydrogen gas. The reaction occurs in a similar way as magnesium does, but
much less vigorous.
iron + steam —> iron (II) iron (III) oxide
3Fe(s) + 4H2O(g) —> Fe3O4 (s) + 4H2 (g)
* Fe3O4 = FeO.Fe2O3
Reaction with oxygen
Strong heating is required to make iron powder burn in oxygen. The reaction gives out a yellow showery sparks and produces a
iron + oxygen —> iron (II) oxide, iron (III) oxide
3Fe(s) + 2O2(g) —> Fe3O4(s)
Reaction with dilute acids
Iron reacts with dilute hydrochloric acid to give iron chloride and hydrogen gas.
iron + hydrochloric acid —> iron chloride + hydrogen
Fe(s) + 2HCl(aq) —> FeCl2(aq) + H2(g)
Iron reacts with dilute sulphuric acid to give iron sulphate and hydrogen gas.
iron + sulphuric acid —> iron sulphate + hydrogen
Fe(s) + H2SO4 (aq) —> FeSO4(aq) + H2(g)
Iron reacts with dilute nitric acid to give Iron nitrate and hydrogen gas.
iron + nitric acid —> iron nitrate + hydrogen
Fe(s) + 2HNO3(aq) —> Fe(NO3)2(aq) + H2(g)