Crystallisation/Use of solvents as a separation technique

Question 1

WHAT IS CRYSTALLISATION?

Answer 1

(damn no need to shout)
- Crystallisation is a separation technique that is used to separate a solid that has dissolved in a liquid and made a solution

Question 2

What happens to the solution in crystallisation?

Answer 2

The solution is warmed in an open container allowing the solvent to evaporate, leaving a saturated solution

Question 3

What is called a saturated solution?

Answer 3

A solution that has as much as solid dissolved in it as it can possibly contain is called a saturated solution

Question 4

How do we get the crystals?

Answer 4

As the saturated solution is allowed to cool, the solid will come out of the solution and crystals will start to grow. The crystals can then be collected and allowed to dry.

Question 5

How are solids separated from each other?

Answer 5

By the use of solvents😎 (its like drugs).

Question 6

What happens in this method of separating solids?

Answer 6

A solvent is chosen that dissolves one of the components of the mixture but not the other.

Question 7

What is an example of the method of separating solids?

Answer 7

If you wanted to remove copper sulfate from a mixture of sand and copper sulfate, you could add the solvent, water. Water dissolves the copper sulfate but not the sand.

Question 8

How can you retrieve both solids after separating them?

Answer 8

Solution- Water is added to dissolve the copper sulfate
Filtration- This is to retrieve the sand
Crystallisation- This is to retrieve the copper sulfate