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Acids and alkali- Neutralisation Research

Acids and alkali- Neutralisation Research. TASK: Use your own knowledge and the internet to complete each PPT slide. http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/acids_bases_metals/revise1.shtml. List 5 everyday acids and alkali (5 of each). Alkali. Acids.

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Acids and alkali- Neutralisation Research

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  1. Acids and alkali- Neutralisation Research TASK: Use your own knowledge and the internet to complete each PPT slide http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/acids_bases_metals/revise1.shtml

  2. List 5 everyday acids and alkali (5 of each) Alkali Acids Washing powder

  3. soap Hydrochloric acid Sodium hydroxide egg Distilled water (pure)

  4. 7E Neutralisation - What is neutralisation? Read his slide, and answer the question If the right amounts of an acid and an alkali are added together the pH of the mixture changes to neutral (pH 7). acid + alkalineutral solution This reaction is neutralisation. What would happen to the pH value if more acid was added to the mixture? Answer:_______________________________________ What would happen to the pH value if more alkali was added to the mixture? Answer:_______________________________________

  5. Complete the questions A beesting isacidic. A wasp sting isalkaline. What should I add to neutralize the bee sting? Add alkali, toothpaste, washing up powder 2) What should I add to neutralize the wasp sting? Add acid. Vinegar, lemon juice

  6. Neutralisation reactions • The reaction between an acid and alkali produces salt and water Acid + alkali salt + water Re arrnage these words and to show a word equation for an example of a neutralisation reaction Sodium hydroxide Sodium Chloride Hydrochloric acid + + water Re arrnage these chemical formula to show a symbol equation for an example of a neutralisation reaction + HCl + NaOH NaCl H2O

  7. Research, the uses of neutralisation reactions • On each of the following slides, research how neutralisation reactions are used • Use pictures and diagrams to help you explain the application of neutralisation reactions • DO NOT COPY AND PASTE, summarise using your own words in 1 or 2 sentences.

  8. Treating stomach acid Neutralise stomach acid with alkali tablets (indigestion tablets)

  9. Toothpaste • Toothpaste neutralises acid in the mouth

  10. Soil treatment- Farming

  11. Your choice, research another use of neutralisation reactions

  12. Complete these summary True/false statements True or false • 1). All acids are safe • 2). If a substance has a pH of 7, it is neutral • 3). Pineapple juice is acidic • 4). Bleach is alkaline • 5). All acids taste sour • 6). Alkalis feel soapy • 7). When an alkali is added to acid it is neutralised • 8). All acids burn through things • 9). Some substances are acidic and alkaline at the same time • 10). Strong acids are corrosive • 11). Pure water is alkaline • 12). All neutral solutions are harmless • 13). Acids have a pH greater than 7 • 14). Acids can dissolve metals • 15). Lemon juice contains citric acid

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