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Question
Name a salt whose solubility decreases with temperature.
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Solution
Calcium sulphate
RELATED QUESTIONS
The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.
Which of the following salt has a blue colour and why?
CuSO4.5H2O or CuSO4
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
Write the name and formula of one salt each which contains:
two molecules of water of crystallisation
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
Define the following term:
Hygroscopy
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
The Salt Story
From: The New Indian Express 9 March 2021
The salt pans in Marakkanam, a port town about 120 km from Chennai are the third largest producer of salt in Tamil Nadu. Separation of salt from water is a laborious process and the salt obtained is used as raw materials for manufacture of various sodium compounds.
One such compound is Sodium hydrogen carbonate, used in baking, as an antacid and in soda acid fire extinguishers.
The table shows the mass of various compounds obtained when 1litre of sea water is evaporated.
| COMPOUND | FORMULA | MASS OF SOLID PRESENT /g |
| Sodium Chloride | NaCl | 28.0 |
| Magnesium Chloride | MgCl2 | 8.0 |
| Magnesium Sulphate | MgSO4 | 6.0 |
| Calcium Sulphate | CaSO4 | 2.0 |
| Calcium Carbonate | CaCO3 | 1.0 |
| TOTAL AMOUNT OF SALT OBTAINED | 45.0 | |
What is the pH of the acid which is used in the formation of common salt?
A salt that is formed by the complete neutralization of an acid and a base is called ______ salt.
What are hygroscopic substances?
