Neutralization

NEUTRALISATION

1. NEUTRALISATION CHEMISTRY GROUP MEMBERS: NOR BAIZURA BT MAHAT G 1028492 FARAH AYUNI BT RAMLY G 1023008 WAN NOR AZIERA BT WAN MUSTAFA G 1023164

2. LEARNING OUTCOMES: At the end of this lesson students will be able to : Explain the meaning of neutralisation. Write equations for neutralisation reaction Explain the application of neutralisation in daily life LEARNING OBJECTIVE: Analysing neutralisation

3. X Y Colourless solution

4. What happen if we put universal indicator? Methyl orange solution X Y

5. X Y Redish colour Yellow colour

6. Can You predict what is solution x and solution Y ???? X Y Redish colour Acid Base Yellow colour

7. ACID WATER SALT BASE + + H 2 O NaCl NaOH HCl Cl _ OH _ H + + + Na + Na + Cl _ H + OH _ + EQUATION FOR NEUTRALISATION

8. WHAT IS NEUTRALISATION : Neutralisation is a reaction between acid and base to produce salt and water . DEFINATION

9. HNO 3 + Ca(OH) 2  H 2 SO 4 + Ba (OH) 2  HCl + KOH  Answers: + + + H 2 O KCl Ca (NO 3 ) 2 BaSO 4 H 2 O H 2 O 2 2 2

10. APPLICATIONS OF NEUTRALISATIONS Insect Stings Bee stings are acidic and can be neutralised with baking soda (bicarbonate of soda). Wasp stings are alkaline and can be neutralised with vinegar. Indigestion : Our stomach carries around hydrochloric acid. Too much of this leads to indigestion. To cure indigestion, you can neutralise the excess acid with baking soda or specialised indigestion tablets.

11. Soil Treatment : When soils are too acidic (often as a result of acid rain) they can be treated with slaked lime, chalk or quicklime, all alkalis. Plants and crops grow best in neutral soils Factory Waste : Liquid waste from factories is often acidic. If it reaches a river it will destroy and kill sea life of many forms. Neutralising the waste with slaked lime can prevent this.