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how to know which oxides reacts with both acids and base?

Asked by imtiyazmulla68 19th November 2017, 7:42 PM
Answered by Expert
Oxides react with both acid and base are called as amphoteric oxides.
Some amphoteric oxides are 
In case of transition metal oxides, it has been observed that
i) the oxides in which the metal is in lower oxidation state are basic in nature 
ii) the oxides in which the metal is in higher oxidation state are acidic in nature
iii) the oxides in which the metal exhibits intermediate oxidation states are amphoteric in nature.
For example, among the oxides of manganese, MnO is basic, Mn2O3, Mn3O4, and MnO2 are amphoteric while Mn2O7 is acidic.
Answered by Expert 20th November 2017, 1:00 PM
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