info.improove@gmail.com
+91 81788 23424

Experiment 21: Water of crystallization

Experiment 21: Water of crystallization

Objective

Study water of crystallization in Copper Sulphate

Materials required:

  • copper sulphate crystals
  • burner
  • test tube

Procedure:

  • Take some crystals of copper sulphate (CuSO4.5H2O) in a test tube
  • Heat these crystals on a burner
  • Note the change in colour of the copper sulphate crystals during the heating. Does it show a bluish white colour? If yes, keep on heating the crystals for some more time. After some time as temperature reaches around 250 °C, the copper sulphate crystals starts appearing white.
  • Stop heating when it becomes complete white
  • Keep the test tube in open atmosphere for some time and allow it to cool. Do you find a change in the colour of copper sulphate crystals

Findings:

  • One of the sales turns blue litmus red and the gas turns lime water milky

Conclusions:

  • Sample which turned red litmus blue and lime water milky contains baking powder

Theory:

  • Blue crystals of copper sulphate contains water of crystallization. These crystals dehydrate on heating to lose water of crystallisation at a particular temperature and also change their colour. If the dehydrated copper sulphate solid material is allowed to cool in air, then it regains blue colour after gaining water molecules from the atmosphere.
    CuSO4 • 5 H20 (bluish) → CuSO4(anhydrous, white) + 5 H2O

Experiment-based learning kits

img
Chemistry Lab in A Box (Upto Class 10)

Comprehensive chemistry kit for Class 6 to 10

  • All reagents and lab equipment needed to do over 33 experiments as per Board syllabus

  • High quality and safe lab reagents

  • Videos of all the experiments Detailed instruction booklet with theory, concepts and procedures

MRPRs 4,499/-
AmazonRs 2,349/-
Buy on Amazon
FlipkartRs 2,399/-
Buy on Flipkart
HereRs 1,999/-
Buy Now
img
Refill for home experiment kits

Set of chemicals and reagents for home experiments

  • Support for all major science activity kits like Kutuhal, Einstein Box, Genius Minds, etc.

  • High quality and safe lab reagents

  • Strict quality testing procedures to ensure safety while doing experiments

MRPRs 2,499/-
AmazonRs 1,149/-
Buy on Amazon
FlipkartRs 1,199/-
Buy on Flipkart
HereRs 999/-
Buy Now!!
img
Basic chemistry equipment (starter kit)

Basic equipment to generate excitement towards science

  • Basic set of equipment like test tubes, holder, cleaner, filter papers, pipettes, litmus papers, etc.

  • High quality and safe lab equipment

  • Good starting point for children (suitable for children aged 7-10 years)

MRPRs 1,499/-
AmazonRs 499/-
Buy on Amazon
FlipkartRs 499/-
Buy on Flipkart
HereRs 449/-
Buy Now!!
img
Crystallography @ home

Make bright-colored crystals of different shapes and sizes

  • All reagents and equipment needed to make bright crystals - from multiple compounds

  • Instruction booklet and videos

  • Learn about crystallography - crystal shapes, solubility, effect of temperature, etc.

MRPRs 1,499/-
AmazonRs 1,149/-
Buy on Amazon
FlipkartRs 1,149/-
Buy on Flipkart
HereRs 999/-
Buy Now!!