Explain the formation of NaCl (common Salt)
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A salt is a compound formed from an acid by the replacement of the hydrogen in the acid by a metal. For Ex :In HCl,When H is replaced by Na then we get NaCl. Salts are formed when an acid react a base. The salt of hydrochloric acid are called chlorides.
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NaCl (COMMON SALT ) :-
- The chemical name of common salt is Sodium Chloride.
- The chemical formula of common salt is NaCl.
- Preparation - HCl + NaOH —> NaCl + H2O.
- Hydrochloric acid reacts with Sodium Hydroxide to form salt that is NaCl.
- Now, particularly let's look at the preparation of NaCl.
- Na (Sodium) = (2, 8, 1).
- Cl (Chlorine) = (2, 8, 7).
- Now, here we have to remove 1 electron to complete the octet of Sodium and we have to get 1 electron to complete the octet of Chlorine.
- Opposite ions helps in the formation of the compound NaCl. (Ionic formation of compounds)
- Hence, the octet also completes.
- Common Salt is obtained from seawater by evaporation.
- It can also be obtained from underground deposits and thus called Rock salts.
Uses of NaCl -
- It is used as raw material in chemical industries. Example - Caustic soda, Sodium bicarbonate, etc.
- It is used in cooking food. It improves the flavour of food.
- It is also required by our body for the working of immune system.
- It is also used as a preservative in pickles.
- It is used in manufacturing of soaps.
- It is also used in melting ice. (especially in cold countries this is used to melt ice collected on roads)
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