Do now! Can you take a look at your evaporating dishes with your copper sulphate in?

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Presentation transcript:

Do now! Can you take a look at your evaporating dishes with your copper sulphate in?

Last lesson Writing word equations for making salts by neutralisation Making Copper sulphate

Making Copper sulphate

Acid + Base “salt” + water Hydrochloric acid + sodium hydoxide sodium chloride + water Sulphuric acid + Potassium hydroxide Potassium sulphate + water Nitric acid + ammonia ammonium nitrate + water In general, hydrochloric acid makes a chloride, nitric acid makes a nitrate, and sulphuric acid makes a sulphate.

Today’s lesson An indicator exercise The reactivity series

Indicators Indicators are chemicals (coloured dyes) which change colour in acids and alkalis.

Universal Indicator To measure pH, we need an indicator that has a different colour for each value of pH Universal Indicator

Mission impossible?

Mission impossible? Your task is to produce the colours of the rainbow in 6 test tubes using only Universal Indicator liquid and the acids and alkalis provided.

Mission impossible?

Mission impossible? The first group to succeed will receive 3 house marks each

Don’t forget safety glasses! Mission impossible? Don’t forget safety glasses! Use SMALL amounts – it’s easier!

Mission impossible? Go!

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Reactivity Series potassium sodium lithium calcium magnesium aluminium zinc iron tin lead copper silver gold Can you compose a sentence to help you remember this order? (important)