4
Question
The flow diagram shows how a student extracted pure, dry salt from rock salt. Choose the word that completes the flow diagram.
The flow diagram shows how a student extracted pure, dry salt from rock salt. Choose the word that completes the flow diagram.
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Solution
The correct option is C Evaporation
Rock salt or halite is a mineral the contains sodium chloride (table salt) as well as other minerals and impurities.
We can remove most of these contaminants using two simple purification techniques: filtration and evaporation.
Although some impurities will remain in the materials, many of them will have been removed simply by using the difference insolubility in water, mechanical filtration, and by applying heat to drive off volatile compounds.
Option A is correct.
Rock salt or halite is a mineral the contains sodium chloride (table salt) as well as other minerals and impurities.
We can remove most of these contaminants using two simple purification techniques: filtration and evaporation.
Although some impurities will remain in the materials, many of them will have been removed simply by using the difference insolubility in water, mechanical filtration, and by applying heat to drive off volatile compounds.
Although some impurities will remain in the materials, many of them will have been removed simply by using the difference insolubility in water, mechanical filtration, and by applying heat to drive off volatile compounds.
Option A is correct.
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