Advertisements
Advertisements
प्रश्न
Define water of crystallization. Give two examples with formulae.
Advertisements
उत्तर
The fixed amount of water which is in loose chemical combination with a salt in its crystal is called water of crystallization.
Examples:
| Common name | Chemical name | Formulae |
| Blue vitroil | Copper sulphate pentahydrate |
CuSO4 5H2O |
| Green vitriol | Iron (2) sulphate heptahydrate | FeSO4 7H2O |
APPEARS IN
संबंधित प्रश्न
Give two examples of Crystalline anhydrous substances.
What do you observe when Blue vitriol is heated?
Give the names and formulae of two substances.
Hydrated substance
What are hydrous substances? Explain with examples.
Match the substances in List I with the appropriate answer in List II.
| List I | List II |
| 1. Green vitriol | A: Permanent hardness in water |
| 2. Paint | B: Hygroscopic |
| 3. Magnesium chloride | C: Temporary hardness in water |
| 4. Magnesium bicarbonate | D: Heptahydrate |
| 5. Calcium oxide | E: Colloidal |
Explain the following observation:
Why is fused calcium chloride or cone, sulphuric acid used in a desiccator?
Differentiate between hydrated and anhydrous crystals with examples. State three defined changes that occur when hydrated copper sulphate is heated.
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
