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Starter – think about these questions, you can jot ideas in the back of your book!

Starter – think about these questions, you can jot ideas in the back of your book!. What is an acid? What is an alkali? What is the difference between an base and an alkali? What does neutral mean? What is neutralisation?. Objectives.

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Starter – think about these questions, you can jot ideas in the back of your book!

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  1. Starter – think about these questions, you can jot ideas in the back of your book! • What is an acid? • What is an alkali? • What is the difference between an base and an alkali? • What does neutral mean? • What is neutralisation?

  2. Objectives • To understand and be able to use key science words (acid, alkali, neutral, base and neutralisation). • To know the general equation for neutralisation and be able to use this to generate specific equations. • To be able to add details onto a data logged graph of neutralisation.

  3. pH scale

  4. Neutralisation • Measure 20cm3 of hydrochloric acid into a beaker. • Add a few drops of UI soln. • Using a pipette, add sodium hydroxide to the acid. • Observe.

  5. Log onto the computer. Take a temperature probe and put it into the USB drive. Take the pH probe and put it into the USB drive. Start, programmes, Vernier Software, LoggerPro 3.4.2. Set up the data logger

  6. Neutralisation • Measure 30ml of HCl into a beaker. • Add a little squirt of UI soln. • Put the probe into the ice. • Start collecting the data. • Add NaOH slowly until you have added 35ml. • Stop collecting the data and autoscale. • Print your graph.

  7. Mark in red pen where the graph is acid. Mark in blue pen where the graph is basic. Make in green pen where neutralisation happens. Contrast the temperature and the pH graph – what do they show you? Neutralisation pH Time

  8. Which of these are acids?

  9. Which is true? • All alkalis have a pH <7 • All alkalis have a pH >7 • All alkalis have a pH =7

  10. Which of these is neutral?

  11. What is made is made when an acid and alkali react? • Water • Salt and water • Carbon dioxide, salt and water

  12. Which of these is an alkali?

  13. Which one of the following do alkalis and bases not have in common? • They are the opposites to acids • They have a pH greater than 7 • They dissolve in water

  14. Which is the formula for phosphoric acid? • H3PO4 • H3PO4 • HPO4

  15. What is the name of the salt produced when sodium hydroxide reacts with nitric acid? • Table salt • Sodium chloride • Sodium nitrate

  16. What type of medicine is a cure for indigestion? • Antacid • Strong alkali • Milk • Neutral

  17. Well done!

  18. Try again!

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