Science Experiment

Observing Convetion 1

Aim: To observe convention in a liquid

Equipment:200ml beaker, Water, Tweezers, A crystal of potassium permanganate, A drinking straw, Bunsen burner, heat maty, Tripod and gauze mat.

Method:

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 care full 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.

6. Very gently, So to not disturb the water, Remove the straw.

7.Light the bunsen burner slide it under the tripod so that you are only heating the outside of the beaker where the crystal, Observe.

Observation: At first when I put the crystal in I noticed that the color started spreading through the water as the heat started to make the chemicals darker (crystals).