Purifying Water (Penjernihan Air)

Purifying  Water

*What You Need :

- bottle of mineral water of 1.5 litres

- sand

- gravels

- cowlick

- dirty water

*What to Do :

1. Cut the lower part of the mineral water bottle.

2. Cut the cowlick as long as 5 cm

3. Wash the sand and gravels thoroughly.

4. Put cowlick, gravels, and sand

*Observation

Compare the clarity of the water before and after filtration.

1. Can the dirty water used in this experiment be called a mixture?

     Answer: Yes, it can be called as a mixture. Because water is mixed with various substances that are soluble and can not be separated again if it has been united into a new substance. Mixture present in the water is a heterogeneous mixture.

2. Why does the water become clearer after filtration?

     Answer:  Because the water through some screening process. The first through the sand,then gravels, and the last cowlick. Thus that the separator sand with gravel and water splitting with the cowlick aimed to separate substances that are mixed in the water mixture. Particles that have a smaller size will escape intact, large sieve will be captured on the filter. So it can be concluded that the more the filter material, the more clear water is produced.

3. What process takes place in the experiment?

     Answer: Water infiltrating from various openings in the filter substances consisting of sand, gravel and cowlick. At the time of the dirty water out, it becomes clear however, changed the color to red brown. Brownish-red color is produced by the natural color of these cowlick.