How do you separate salt from salt solution?

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Payal Khullar | College Teacher | (Level 2) Associate Educator

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Some laboratory techniques that can be used to separate solid substances from their solutions are evaporation, filtration, crystallisation, and centrifugation. Your choice of the technique will depend upon the nature of the solid and the solution. Salt mixes well in water to form a clear salt solution. As we know, salt and water have different boiling points. Hence, we can use the "evaporation" technique to separate salt from salt solution. For this, one has to simply heat the salt solution till all the water boils and evaporates, and salt is left behind. In laboratory, we can also collect the evaporated water through condensation.

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teachervee | (Level 1) eNoter

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One very easy way to separate salt from saline solution is the process of evaporization. With the use of extreme heat, the water or solvent from the solution will evaporize, thus leaving the salt. But in other laboratories, separation of salt from the solution can be done by doing sophisticated experimentation.

salt water want to be pumb hardly to a fitring paper then salt suprate and salt water change to pure water then do evopration then it will be so easy and fast process

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udonbutterfly | Student, College Freshman | (Level 1) Valedictorian

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I have done this lab in chemistry before! There are two ways you can spate salt from a salt solution. The first and most commonly used way would be to boil the salt solution until the salt remains in the container. Since salt is a solid and does not turn into vapor it will remain in the container as deposit. The second way would be to use a coffer filter to filter the water away from salt.

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malkaam | Student, Undergraduate | (Level 1) Valedictorian

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The easiest way to separate a salt from a salt solution is by the method of evaporation. It can be done by using a burner and a boiling dish. When the burner is turned on, the boiling dish with the salt solution is placed on it and it is allowed to boil. On heating the solution, the process of evaporation takes place and liquid turns to gas, therefore all the water is converted into vapors and salt is left alone in the boiling dish.

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CaitlynnReeves | Student, Grade 12 | (Level 1) Salutatorian

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If the salt solution happens to be salt and water the quickest way to seperate them would be the evaporation method. 

Boil the solution until all the water has evaporated. The salt (being a solid) is too heavy to evaporate with the water therefore it will remain in the container. 

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atyourservice | Student, Grade 11 | (Level 3) Valedictorian

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a way to separate salt from a salt solution is by evaporation. When left alone in an area of high heat the liquid substance usually evaporates leaving behind the salt.

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mmenon | Student, Grade 12 | (Level 3) eNoter

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To separate salt from a salt solution, the easiest method you can use filtration. You will need a filter funnel, filter paper, the solution and a beaker. Pour the solution into the filter funnel fitted on top of the beaker and lined with filter paper. You will be left with a residue on the filter paper. The residue left will be the salt from the solution.

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ayl0124 | Student, Grade 12 | (Level 1) Valedictorian

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One method of extracting a solid from a solution is evaporation, which is probably the best method for this scenario. You can heat the solution so that all the water evaporates, leaving the solid salt behind. An aqueous solution is basically a solid chemical (solute) mixed with water (solvent). By removing all the water, you are left with the salt. 

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