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 – Nature of Oxides Amount of."— Presentation transcript:
1 What is an oxide?An oxide is a Binary compound of oxygen and another element.M & OOxides can be classified in two ways –Nature of OxidesAmount of Oxygen present
2 1. Types of Oxides based on their nature Most oxides can be grouped into four types:acidic oxidesbasic oxidesamphoteric oxidesneutral oxides
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 acidSO3 + H2O H2SO4
5 Acidic oxides React with bases and alkalis to produce salts Example: carbon dioxide + sodium hydroxide sodium carbonate + waterCO2 + 2NaOH Na2CO3 + H2O
6 Acidic oxides React with basic oxides to produce salts SiO2 + MgO MgSiO3
7 Examples of acidic oxides FormulaAcid Produced with Watersulphur trioxideSO3sulphuric acid, H2SO4sulphur dioxideSO2sulphurous acid, H2SO3carbon dioxideCO2carbonic acid, H2CO3phosphorous(V) oxideP4O10phosphoric acid, H3PO4
8 Basic oxides Oxides of metal Basic oxides are often solids at room temperature.Most basic oxides areinsoluble in water.Calcium oxide (quicklime)
9 This is a neutralisation reaction Basic oxidesReact with acids to produce salts and water only.Example:Magnesium oxide + hydrochloric acid magnesium chloride + waterMgO + 2HCl MgCl2 + H2OThis is a neutralisation reaction
10 Examples of basic oxides Formulamagnesium oxideMgOsodium oxideNa2Ocalcium oxideCaOcopper(II) oxideCuO
12 Amphoteric oxides Oxides of metal Can behave as acidic oxides or as basic oxidesZinc oxide
13 Amphoteric oxides React with acids and alkalis to produce salts Example: aluminium oxide (Al2O3)aluminium oxide as a basealuminium oxide as an acidhydrochloric acidaluminium chloridewateraluminium oxide+aluminium oxidesodium hydroxidesodium aluminatewater+
14 Neutral oxidesNon-metals that form oxides that show neither basic nor acidic properties.Insoluble in water.