chemical properties of basic and acid oxides, oxyacids and bases

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Last updated 4:32 PM on 4/9/26
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9 Terms

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What are amphoteric oxides?

They exhibit both basic and acidic properties, so can react with both (eg) HCl and NaOH

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Properties of basic oxides

  1. Solubility

  2. Base + acid

  3. Thermal stability

  1. Insoluble in water

  2. Salt + water

  3. Thermally stable

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Properties of acid oxides

  1. Solubility

  2. Base + acid

  3. Thermal stability

  1. Dissolve in water

  2. Salt + water

  3. May decompose upon heating, releasing oxygen gas.

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What are oxyacids?

Class of acids that contain oxygen, hydrogen and a third element, often a non-metal

General formula: HₙXOₘ

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What affects oxyacid strength?

  • More oxygen atoms → stronger acid

  • More electronegative central atom → stronger acid

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Why are oxyacids often water soluble?

They are polar molecules

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What is a dehydration reaction in oxyacids?

Loss of water, which results in an acid anhydride

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Different ways salts can be prepared

  • neutralisation reaction

  • Direct combination of a metal and non-metal

  • Double displacement (precipitation) reaction

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Properties of salts

  • high melting and boiling point

  • Molten and aqueous solution can conduct electricity

  • Don’t react with acids or bases