Final answer:
To separate pure salt from a rock salt mixture, you can use methods such as evaporation, filtration, or crystallization.
Step-by-step explanation:
Method for separating pure salt from a rock salt mixture:
One method is called evaporation. In this process, the rock salt mixture is dissolved in water to form a solution. The mixture is then heated, causing the water to evaporate. As the water evaporates, the salt crystals are left behind and can be collected.
Another method is called filtration. In this process, the rock salt mixture is mixed with water to dissolve the salt. The mixture is then poured through a filter paper, which allows the water and dissolved salt to pass through while leaving behind any solid impurities. The filtered solution can then be heated to evaporate the water and obtain pure salt crystals.
A third method is called crystallization. In this process, the rock salt mixture is dissolved in water to form a solution. The solution is then cooled, causing the salt to crystallize and form solid crystals. The solid crystals can be separated from the remaining liquid using filtration or decantation.
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