1. Set up a Bunsen burner on a heatproof mat. Put the gauze mat on the tripod but leave it just to one side of the Bunsen burner.
2. Fill a 200 ml beaker with 150 ml 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
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 not disturb the water, remove the straw.
7. Light the Bunsen and slide it under the tripod so that you are only heating the outisde of the beaker where the crystal is. Observe.
Results:The purple water rose
Discussion:
My group dropped a potassium permanganate through the straw and waited for the crystal to settle down.Then we removed the straw and saw how the potassium permaganate and went up because it is less dense.
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