Chapter 11.4: Oxides

Question 1

What do metallic oxides form?

Answer 1

Basic and amphoteric oxides

Question 2

What do non-metallic oxides form?

Answer 2

Neutral and acidic oxides

Question 3

State the solubility of oxides

Answer 3

All oxides are insoluble in water except:
- Metal-1 oxides
- Calcium and barium oxide
- Acidic oxides

Question 4

Describe basic oxides

Answer 4

• Metallic oxides
• Solids at room temperature
• Reacts with acids to form salt and water only
• Can be soluble or insoluble in water. Soluble basic oxides form alkalis.

Question 5

Describe amphoteric oxides

Answer 5

• Reacts with acids to form salt and water, behaving like a base
• Reacts with alkalis to form salt and water, behaving like an acid

Acronym: ZAP
ZnO, Al2O3, PbO

Question 6

Describe neutral oxides

Answer 6

• Insoluble in water
• Neither acidic nor basic properties
  Eg. H2O, NO, CO
• All monoxides

Question 7

Describe acidic oxides

Answer 7

• Non-metallic oxides
• Often gases at room temperature
• Water-soluble
• Reacts with alkalis to form salt and water only