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प्रश्न
Outline the steps required to convert hydrogen chloride to anhydrous iron (III) chloride. Write the equations for the reactions.
उत्तर
\[\ce{MnO2 + 4HCI(conc) -> MnCI2 + CI2 + 2H2O}\].
Chlorine thus obtained is derived by passing through concentrated Sulphuric acid. This dried chlorine is passed over heated Iron to get anhydrous Iron (III) chloride.
\[\ce{2Fe(heated) + 3CI2(dry) -> 2FeCI3 }\]
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संबंधित प्रश्न
Name the major salt present in sea-water.
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.
Give the names and formulae of any two salts. Also name the acids and bases from which these salt may be obtained.
Write the name and formula of one salt each which contains:
five molecules of water of crystallisation
Hard water required for an experiment is not available in a school laboratory. However, following salts are available in the laboratory. Select the salts which may be dissolved in water to make it hard for the experiment.
|
(1) |
Calcium Sulphate |
(2) |
Sodium Sulphate |
|
(3) |
Calcium Chloride |
(4) |
Potassium Sulphate |
|
(5) |
Sodium Hydrogen Carbonate |
(6) |
Magnesium Chloride |
(A) 1, 2 and 4
(B) 1, 3 and 6
(C) 3, 5 and 6
(D) 2, 4 and 5
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
Copy and complete the following table which refers to the action of heat on the carbonate:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate |
Sodium carbonate is a basic salt because it is a salt of a ____________.
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?
