Crystallization methods

You are required to obtain some salt crystals from a salt solution. List in the correct order the
series of steps that have to be followed. (Give two methods)



(a) Method 1
1. Heat the solution in an evaporating dish directly on a flame till most of the liquid
evaporates.
2. Transfer the evaporating dish over a steam bath. Heat gently till all the liquid
evaporates (do not boil dry).
3. Leave to cool.
(b) Method 2:
1. Heat the solution in an evaporating dish directly on a flame till most of the liquid
evaporates.
2. Transfer the evaporating dish over a steam bath. Heat gently till the
crystallization point.
Crystallization point is checked by dipping a cold glass rod in the solution from time
to time and checking for the formation of crystals.
3. Leave to cool.
4. Filter off the crystals.
5. Dry the crystals between two filter papers without pressing.