Chemistry Laboratory Practical Experiment - Testing the water of hydration of salt | 10th Science : Chemistry Practicals
Chapter: 10th Science : Chemistry Practicals
Testing the water of hydration of salt
TESTING THE WATER OF HYDRATION OF SALT
Aim:
To check
whether the given sample of salt possesses 'Water of Hydration' or not. To
verify the presence of water molecules in the given hydrated salt .
Principle:
Water of
crystallization or water of hydration is the phenomenon shown by certain salts
in which water molecules are present inside the crystals are responsible for
their colour and geometry. e.g. Crystalline copper sulphate CuSO4.5H2O
Materials Required:
A pinch
of crystalline copper sulphate in a test tube, tongs, spirit lamp.
Procedure:
A pinch
of crystalline copper sulphate taken in a test tube and heated for sometime.
Water droplets are seen on the inner walls of the test tube. This shows that
the given salt contains water of crystallization. If the above observation is
not noticed for the given salt, the water of hydration is absent.
Result:
In the
given sample of salt, Water of crystallization / hydration is
A) Present
B) Absent
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