Decantation separates sand from water by carefully pouring the water layer off the top once the sand has settled to the bottom of the container due to its higher density.
Here's a breakdown of the process:
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Allow the Sand to Settle: Because sand is denser than water, it will naturally settle at the bottom of the mixture when left undisturbed. This settling process can be sped up by ensuring the mixture is in a stable location, free from vibrations.
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Carefully Pour Off the Water: Once the sand has completely settled, slowly and carefully pour the water from the container into another clean container. The key is to pour slowly and steadily, avoiding any disturbance that might cause the sand to mix back into the water.
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Stop Before Pouring Out Sand: As you pour, be vigilant and stop pouring before any of the settled sand is poured out with the water. A small amount of water might be left behind to ensure complete sand separation. This remaining water can be further evaporated if desired.
In essence, decantation leverages the difference in density between sand and water. The denser sand settles, allowing the less dense water to be poured off, separating the mixture.
