Lesson Starter Explain what happens to the colour and pH of an acid if alkali is added Describing neutralisation reactions Everyday neutralisations.

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Presentation transcript:

Lesson Starter Explain what happens to the colour and pH of an acid if alkali is added Describing neutralisation reactions Everyday neutralisations

Learning Intention To learn about neutralising acids by carrying out an ACCURATE neutralisation reaction.

Recap

Experiment Pour acid into a beaker and use syringe to measure 10 mls of acid- add to boiling tube Add a couple of drops of universal indicator to the boiling tube Pour alkali into beaker and use second syringe to measure 10 mls SLOWLY add 1 ml of alkali to boiling tube and swirl- note colour of solution Repeat until colour of solution in boiling tube is green Apparatus Goggles Boiling tube Test tube rack Acid Alkali Two 10 ml syringes Universal indicator 2 x 100ml beakers

Textbook Read page 87 in starting science 2 and answer questions 1-3 in your jotter

All acids and alkalis are harmful

The more concentrated an acid is, the closer to 0 it will appear on the pH scale

Corrosive alkalis are close to 7 on the pH scale

Lemon juice, coke and vinegar are all examples of household acids

Brushing our teeth is an example of a neutralisation reaction

During neutralisation, the pH of a solution always gets higher