Indicate with what classes of compounds the metal oxides react. Give examples, write down the reaction equations.

Metal oxides can react with:

a) simple substances (non-metals and other metals);

CuO + H2 = Cu + H2O

b) acidic oxides;

CaO + CO2 = CaCO3

c) alkaline oxides (only amphoteric metal oxides);

Na2O + Al2O3 = 2NaAlO2

d) acids;

CaO + 2HCl = CaCl2 + H2O

e) alkalis (only oxides of amphoteric metals).

ZnO + 2NaOH = Na2ZnO2 + H2O

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