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This method evaporates water from the solution but then cools it and condenses it into a separate container.

SEPARATION OF SOLUBLE SOLID-LIQUID MIXTURES

example: salty water

vapor to fall, causing the gas to turn into liquid again.

EVAPORATION:

It consists of evaporating a liquid and turning it into a gas due to an increase in temperature and/or pressure

It is a chemical solid–liquid separation technique, in which mass transfers from the liquid solution to a pure solid crystalline phase

example: salt dissolved in water

example: copper sulphate

1. Pour 100mL of distilled water into a beaker

2. Place the beaker on a tripod and heat to 26 grades

3. Add the copper sulfate until it does not dissolve any more and stir continuously

4. Pour the saturated solution into the glass Petri Dish

5. Leave it for some days

1: pour the solution in the evaporating basin

2: put the basin on a tripod

3: light a Bunsen burner and place it under the tripod

4: wait a few minutes and observe the result. Little crystals of salt will be formed and will remain at the

bottom of the basin

DECANOIC ACID

Another way to separate salt and water is via chemical reaction. For instance, research has shown that treating salt water with a chemical called decanoic acid is a reliable way to remove the salt. After adding the acid and heating slightly, then cooling, the salt and other impurities "fall out" of the solution (that is, solidify and sink to the bottom). When the reaction is complete, the water and salt sit in two completely separate layers, making it easy to remove the water.

ELECTRODYALISIS

Using the power of electricity, it's possible to remove particles like salt from water. This is done by submerging a negatively charged anode and a positively charged cathode in water and separating them with a porous membrane. The electrical charge of the anode and cathode essentially "pull" dissolved ions (like those that make up salt) toward them like magnets, leaving pure water.

CRYSTALLIZATION

SIMPLE

DISTILLATION

1: pour the mixture in a flask and place it on

a tripod. Connect it to a thermometer and a

condenser, and place a beaker at the other

end of the condenser.

2: heat the flask and observe the process.

The beaker of the salt solution is heated to

the boiling point of the liquid and turns into

vapor . The vapor is directed through the condenser´s tubes and is cooled down

by the cold water running through them. This forces the temperature of the

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