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Question
Water turns the colour of anhydrous copper sulphate .................
Solution
Water turns the colour of anhydrous copper sulphate blue.
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RELATED QUESTIONS
Give two examples for Deliquescent substance.
What do you observe when Blue vitriol is heated?
Give one word for the following statement:
A property due to which a substance absorbs water without dissolving.
Give the names and formulae of two substances.
Hydrated substance
Give the names and formulae of two substances
Anhydrous substance
Complete the following table:
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Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
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Quick lime |
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Oil of vitriol |
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Washing soda |
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Solid caustic soda |
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Blue vitriol |
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The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called ‘crystallization’. With reference to the statement explain what is meant by ‘water of crystallization. State which physical properties of a crystal are correlated with the water of crystallization.
Explain the following observation:
In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
Differentiate between hydrated and anhydrous crystals with examples. State three defined changes that occur when hydrated copper sulphate is heated.
Match the following
| 1. | Blue vitriol | CaSO4.2H2O |
| 2. | Gypsum | CaO |
| 3. | Deliquescence | CuSO4.5H2O |
| 4. | Hygroscopic | NaOH |
