The properties of oxides

2 marks · Normal

State whether the following oxides are acidic or basic:

(a)

Sodium oxide (Na2O)

[1 mark]

(b)

Carbon dioxide (CO2)

[1 mark]

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(a) Basic

(b) Acidic

Common mistakes: Mixing up metal/non-metal

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Marking points

B1 (a) · 1 mark · Correctly identifies sodium oxide as basic.

B1 (b) · 1 mark · Correctly identifies carbon dioxide as acidic.

Worked solution

a) Sodium oxide is a basic oxide because it is a metal oxide.

b) Carbon dioxide is an acidic oxide because it is a non-metal oxide.