Equipment: Beaker, water, a plastic straw, a crystal of potassium permanganate.
Method:
- Half fill your Beaker with cold tap water.
- Place the petri dish on your workbench and allow the water to become settled.
- Using the plastic straw, put your finger over the straw and put in water. Remove finger and place a single crystal of potassium permanganate in the centre of the Beaker.
- Observe for 5 minutes.
- Repeat the experiment using hot water.
Discussion: In cold water, the crystal diffused in a rapid motion and went everywhere in the water.
In hot water, the crystal diffused mostly around the bottom of the beaker
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