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:
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
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
1. Acidic oxides Oxides of non-metal Acidic oxides are often gases at room temperature.
Acidic oxides React with water to produce acids. Example: sulphur trioxide + water sulphuric acid SO 3 + H 2 O H 2 SO 4
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
Acidic oxides React with basic oxides to produce salts SiO 2 + MgO MgSiO 3
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
Basic oxides Oxides of metal Basic oxides are often solids at room temperature. Most basic oxides are insoluble in water. Calcium oxide (quicklime)
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
Examples of basic oxides Basic Oxide Formula magnesium oxideMgO sodium oxideNa 2 O calcium oxideCaO copper(II) oxideCuO
Amphoteric oxides Oxides of metal Can behave as acidic oxides or as basic oxides Zinc oxide
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 + +
Neutral oxides Non-metals that form oxides that show neither basic nor acidic properties. Insoluble in water.