What are the chemical properties of oxides? (Give examples)
1.1 From the reaction of metal oxides with water, there are forming bases.
- the reaction of lime with water:
1.2 From the reaction of oxides of non-metals with water, are resulting acids.
CO2+H2O -> H2CO3
SO2+H2O -> H2SO3
SO3+H2O -> H2SO4 (sulfuric acid)
2. From reaction with bases of acids oxides are resulting salt and water.
CO2 + Ca(OH)2= CaCO3+H2O
3. From reaction with acids of basic oxides are resulting salt and water.
CuO+2HCl = CuCl2 + H2O
4. From the reaction of acids oxides with hydrogencarbonate results salts.
OH: (Hydroxyl ion ) POH : Presense of hydorxyl ion & cheifly responsible for basicity of the products.
POH >= : ranges starting from 8 to 14
PH >= 0 to 7 , responsible for acidic nature .
Most of Matieral to humen usage s/h 7 Nutral PH / POH neither acidic nor alkali .