7.2.1

Oxides

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Oxides

An oxide is a compound of oxygen and another element. The element can be a metal or a non-metal. Oxides are formed by combustion.

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Basic oxides

  • Metals form metal oxides, which are basic.
  • One example is sodium oxide.
  • These oxides dissolve in water to form hydroxide ions.
    • Na2O(s) + H2O(l) → 2NaOH(aq)
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Amphoteric oxides

  • Some metallic oxides are amphoteric oxides. They react with both acids and alkalis to produce salts.
  • One example is aluminium oxide (Al2O3).
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Acidic oxides

  • Non-metals form non-metal oxides, which are acidic.
  • One example is sulfur dioxide.
  • These oxides are normally gases. They dissolve in water to form a mineral acid and release H+ ions.
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Neutral oxides

  • Some non-metal oxides are neutral oxides. They don't react with acids or alkalis.
  • One example is carbon monoxide (CO).

Jump to other topics

1States of Matter

2Atoms, Elements & Compounds

3Stoichometry

4Electrochemistry

5Chemical Energetics

6Chemical Reactions

7Acids, Bases & Salts

8The Periodic Table

9Metals

10Chemistry of the Environment

11Organic Chemistry

11.1Formulae, Functional Groups & Terminology

11.2Naming Organic Compounds

11.3Fuels

11.4Alkanes

11.5Alkenes

11.6Alcohols

11.7Carboxylic Acids

11.8Polymers

12Experimental Techniques & Chemical Analysis

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