nature

Nature of metal oxides : Nature of metal oxides Most of metal oxides are basic in nature. 2 Cu + O2? 2CuO (basic) But some of them show both acidic as well as basic nature.these are known as AMPHOTERIC OXIDES Al2O3 +6 HCl ? 2 AlCl3 + 3H2O (basic) Al2O3 + 2NaOH ? 2NaAlO2 +H2O (acidic). Therefore Al2O3 is amphoteric in nature Most metal oxides are insoluble in water, but some of these dissolve in water to form ALKALIS. Na2O + H 2O ? 2NaOH K2O + H2O ? 2KOH Therefore these are alkalis .