Aim
to conserve in a liquid
Equipment
Petri dish tweezers a crystal of potassium permanganate
Method
1 half fill your Petri with cold tap water
2 place the petri dish on your workbench and allow the water to become settled
3 using the tweezers place a single crystal of potassium permanganate in the centre of the petri dish
4 observe for 5 minutes
5 repeat using hot water
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