Method:
1. set up the Bunsen Burner on a heatproof mat. Put the guaze mat on the tripod but leave it just to on side of the Bunsen Burner.
2. Fill a 200ml beaker with 150ml cold water.
3. Place the beaker on top of the tripod and gauze and allow it to settle for a few minutes.
4. Carefully insert a drinking straw down one side of the beaker. ensuring the straw is touching the bottom of the beaker. Be careful as you do not want to disturb the water too much.
5. Using tweezers, drop a crystal of potassium permanganate down the inside of the straw. wait for the crystal to settle on the bottom of the beaker.
6. Very gently, so to no disturb the water, remove the straw.
7. Light the Bunsen and slide it under the tripod so that you are the only heating the outside
Discussion: The hot purple water rises up to the top because it is less dense. And the purple rised up and looked really cool.
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