17. Red, White and Blue   Previous PageNext Page
       Tips, Safety and Theory


Scale the volumes up if the audience is some way away.

Stand the phenolphthalein and copper sulphate flashs on white filter paper and the lead nitrate one on black paper for maximum effect.

Go over the reactions with a suitable audience. Ask them to predict the contents of the second flask (after explaining the sleight of hand). Ask them to suggest ways of producing other colours.


Wear eye protection.



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