Filtration separates water from sand by using a filter (like filter paper) that has tiny pores which allow water to pass through while trapping the larger sand particles.
The Filtration Process Explained:
The process of separating water from sand using filtration relies on the difference in particle size. Here's a breakdown:
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Mixture Preparation: The sand and water are combined, forming a heterogeneous mixture (meaning the components are easily distinguishable).
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The Filter: A filter, most commonly filter paper, is used. This filter has very small pores.
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Pouring: The sand and water mixture is poured through the filter.
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Water Passage: Because water molecules are much smaller than sand grains, the water easily passes through the pores of the filter paper.
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Sand Retention: The sand particles, being larger, are unable to pass through the pores. They are therefore trapped on the filter paper.
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Separation Achieved: The result is separated water (the filtrate) and sand retained on the filter paper (the residue).
Visual Representation:
| Component | Particle Size | Behavior During Filtration |
|---|---|---|
| Water | Small | Passes through the filter paper |
| Sand | Large | Remains trapped on the filter paper |
Examples of Filtration in Daily Life:
- Water Purification: Filtration is used in water treatment plants to remove sediment and other particulate matter from drinking water.
- Coffee Brewing: Coffee grounds are separated from brewed coffee using a filter.
- Air Filters: Air filters in cars and homes remove dust and pollen from the air.
