Equipment: Petri dish, water, tweezers, a crystal of potassium permanganate.
Method:
- Half fill your petri dish with cold tap water
- Place the petri dish on your work bench and allow the water to become settled.
- Using the tweezers, place a single crystal of potassium permanganate in the center of the petri dish.
- Observe for 5 minutes.
- Repeat the experiment using hot water.
Results: With time the colour of the crystal spread throughout the water. It spread faster in the hot water rather than the cold water.
Discussion: The water was clear to start and was the at the most diluted stage. Once we added the crystal, the solute spread throughout the water and it became more concentrated. The colour spread faster with warmer water rather than cold because with heat added into the mix, the particles more faster, causing it to spread faster.
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