Q39 of 270 Page 97

What will happen if heating is not controlled while preparing plaster of Paris?

If heating is not controlled while preparing Plaster of Paris, then all the water of crystallisation of gypsum is eliminated and it turns into a dead burnt plaster.


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37

How would you show that blue copper sulphate crystals contain water of crystallization?

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Explain how anhydrous coppersulphate can be used to detectthe presence of moisture (water) in a liquid.

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Write an equation to show the reaction between plaster of Paris and water.

 40

What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.