Write equations for the reactions of (i) iron with steam (ii) calcium and potassium with water
(i) 3Fe (s) + 4H2O (g) → Fe3O4 (aq) + 4H2 (g)
(ii) Ca (s) + 2H2O (l) → Ca(OH)2 (aq) + H2 (g) + Heat 2K (s) + 2H2O (l) → 2KOH (aq) + H2 (g) + Heat
