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Both the components in the mixture are insoluble in water. However, calcium carbonate reacts with hydrochloric acid to form calcium chloride (which is soluble in water) whereas the sand remains unchanged. Sand can now be separated by filtration. Calcium carbonate is recovered back by treating the filtrate (calcium chloride) with sodium carbonate. After filtration is again carried out, what you have on the filter paper is calcium carbonate.

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12y ago
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13y ago

Probably the simplest way is to wash the mixture with water with water until no more of the mixture dissolves, then evaporate the wash liquid to obtain the calcium carbonate. The sand remains undissolved.

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6y ago

Evaporate the water from the solution.

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8y ago

You can use filtration.

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6y ago

Filtering is a good method.

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Q: How do you separate calcium carbonate from sand?
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