Write the chemical formula of hydrated copper sulphate and anhydrous copper sulphate giving an activity illustrate how these are interconvertible
Answers
a) Hydrated copper sulphate – CuSO4.5H2O Anhydrous copper sulphate – CuSO4. Activity :
(i) Heat a few crystals of copper sulphate in a dry boiling tube.
(ii) Add 2-3 drops of water on the sample of copper sulphate obtained after heating. After heating, water is removed and salt turns white. If crystal are moisten again with water, blue colour reappears. Water of crystallization is fixed number of water molecules present in one formulae unit of a salt. Five water molecules are present in one formula unit of copper sulphate.
(b) Calcium sulphate hemihydrate – CaSO4. H2O Calcium sulphate dihydrate – CaSO4.2H2O.
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Answer:
Explanation:
(a) Hydrated copper sulphate- CuSO4 .5H2OAnhydrous copper sulphate- CuSO4
Activity :
(i) Take a few crystals of CuSO4 . 5H2O in a test tube and heat it.
(ii) Then add 2-3 drops of water on the sample of copper sulphate obtained after heating. After heating, water is removed and salt turns white. If crystals are moisten again with water, blue colour reappears.
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