Particle Theory of Matter - Convection

Particle Theory of Matter - Convection

Aim: 

To observe convection in a liquid

Equipment: 

200 ml beaker, water, tweezers, a crystal of potassium permanganate, a drinking straw, Bunsen burner, heat mat, 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 of the side of the Bunsen burner. 

2. Fill a 200 ml beaker with 150 ml of 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 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 outside of the beaker where the crystal is. Observe.

Observations:
When we inserted the crystal down the side with the heat. The purple liquid started moving to the top more on the side with the heat went up first
Explanation:
This because hot water wanting to move to the cold areas