Question

classify the following oxides into three types and name the types. CaO, MgO, CO2, SO3, Na2O, ZnO, Al2O3, Fe2O3​

Answer 1

There are three types of oxides:

i. Acidic oxides: Acidic oxides are the oxides of non-metals. When these oxides are combined with water, they form acid and when combined with base, form salts.

CO2 and SO3 are the acidic oxides

ii. Basic oxides: Basic oxides are the oxides of metals. They combined with water to form hydroxides and when combined with acid, they form salts.

CaO, MgO and Na2O are the basic oxides

iii. Amphoteric oxides: These are metallic oxides and exhibit the property of both acid and base.

When react with an acid , they form salt and water, this shows the basic properties. When react with a base, they form salt and water, this shows the acidic properties.

ZnO, Al2O3 and Fe2O3 are the amphoteric oxides

Answer 2

CaO + SO3 → CaSO4

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