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What is an oxide? An oxide is a Binary compound of oxygen and another element. M & O Oxides can be classified in two ways – 1. Nature of Oxides 2. Amount.

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Presentation on theme: "What is an oxide? An oxide is a Binary compound of oxygen and another element. M & O Oxides can be classified in two ways – 1. Nature of Oxides 2. Amount."— Presentation transcript:

1 What is an oxide? An oxide is a Binary compound of oxygen and another element. M & O Oxides can be classified in two ways – 1. Nature of Oxides 2. Amount of Oxygen present

2 Most oxides can be grouped into four types: 1.acidic oxides 2.basic oxides 3.amphoteric oxides 4.neutral oxides 1. Types of Oxides based on their nature

3 1. Acidic oxides Oxides of non-metal Acidic oxides are often gases at room temperature.

4 Acidic oxides React with water to produce acids. Example: sulphur trioxide + water sulphuric acid SO 3 + H 2 O H 2 SO 4

5 Acidic oxides React with bases and alkalis to produce salts Example: carbon dioxide + sodium hydroxide sodium carbonate + water CO 2 + 2NaOH Na 2 CO 3 + H 2 O

6 Acidic oxides React with basic oxides to produce salts SiO 2 + MgO MgSiO 3

7 Examples of acidic oxides Acidic Oxide Formula Acid Produced with Water sulphur trioxideSO 3 sulphuric acid, H 2 SO 4 sulphur dioxideSO 2 sulphurous acid, H 2 SO 3 carbon dioxideCO 2 carbonic acid, H 2 CO 3 phosphorous(V) oxide P 4 O 10 phosphoric acid, H 3 PO 4

8 Basic oxides Oxides of metal Basic oxides are often solids at room temperature. Most basic oxides are insoluble in water. Calcium oxide (quicklime)

9 Basic oxides React with acids to produce salts and water only. Example: Magnesium oxide + hydrochloric acid magnesium chloride + water MgO + 2HC l MgC l 2 + H 2 O This is a neutralisation reaction

10 Examples of basic oxides Basic Oxide Formula magnesium oxideMgO sodium oxideNa 2 O calcium oxideCaO copper(II) oxideCuO

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12 Amphoteric oxides Oxides of metal Can behave as acidic oxides or as basic oxides Zinc oxide

13 Amphoteric oxides React with acids and alkalis to produce salts Example: aluminium oxide (Al2O3) aluminium oxide as a base aluminium oxide as an acid hydrochloric acid aluminium chloride water aluminium oxide ++ sodium hydroxide sodium aluminate water + +

14 Neutral oxides Non-metals that form oxides that show neither basic nor acidic properties. Insoluble in water.


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