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2 Rock salt is a mixture of salt (sodium chloride) and sand Describe how you would separate rock salt to obtain salt crystals and pure dry sand. __ .... . .

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ElizaProfessional · Tutor for 6 years

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Separate rock salt into salt crystals and pure dry sand by Dissolving the mixture in water, Filtering, and then let the solution undergo Evaporation to form salt crystals.

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## Step 1: Dissolving Rock salt is a mixture of salt (sodium chloride) and sand. Salt is soluble in water while sand is not. Thus, by adding water into the mixture, only the salt gets dissolved, leading to a separation between salt and sand based on their individual solubility characteristics. ## Step 2: Filtering Here, the suspension obtained from Step 1 is filtered. The insoluble component (sand) is unable to pass through the filter, but the saltwater solution can pass through. Hence, separated sand can be recovered from the filter, and the salt remains in the solution. ## Step 3: Evaporation/Crystallization The saltwater solution obtained from Step 2 is then subjected to evaporation or heating. As the water evaporates, salt does not vaporize and is left behind in the container. Gradually, water evaporates completely, leaving behind salt crystals.

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2 Rock salt is a mixture of salt (sodium chloride) and sand Describe how you would separate rock salt to obtain salt crystals and pure dry sand. __ .... . .

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