Acid and Bases Oxides Many acids and bases are formed by dissolving oxides in water.

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Presentation transcript:

Acid and Bases Oxides Many acids and bases are formed by dissolving oxides in water

At the end of this e-learning, you should able to: Classify oxides as acidic, basic, amphoteric or neutral based on metallic/non-metallic character

What is an oxide? An oxide is a compound of oxygen and another element. Most oxides can be grouped into 2 types: acidic oxides basic oxides

Acidic oxides Oxides of non-metals 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 to produce salts Example: carbon dioxide + sodium hydroxide sodium carbonate + water CO 2 + 2NaOH Na 2 CO 3 + H 2 O

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 neutralization reaction

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

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

Examples of neutral oxides Neutral Oxide Formula waterH2OH2O carbon monoxideCO nitric oxideNO