Page 1 - 3.LESSON NOTES-(CH-2 -SODIUM CHLORIDE)

SAI International School
Class-X

Subject_ Chemistry
Topic- Acids, Bases & Salts
Sub Topic- Sodium chloride

LESSON NOTES

• STUDY OF SALTS-
1. COMMON SALT –
OR
I. SODIUM CHLORIDE- Chemical Name

 Of all salts, the most common salt is Sodium Chloride (NaCl).
 It is commonly known as table/common salt.
 It enhances the taste of our food & is essential for our body.
 It is a Neutral salt (pH =7)

Common Salt plays a crucial role in maintaining human health.
It is the main source of sodium and chloride ions in the human diet.
Sodium is essential for nerve and muscle function and is involved in the
regulation of fluids in the body.
It regulates the electrical charges moving in and out of the cells in the body.
Sodium also plays a role in the body's control of blood pressure and volume

 Source

Obtained from Sea Water Found on the Earth’s crust as Rock Salt
By the process of Evaporation. Obtained by the process of Mining.

Deposits of solid salt are also found in several parts of the world.
These large crystals are often brown due to impurities.
This is called rock salt.
Beds of rock salt were formed when seas of bygone ages dried up.
Rock salt is mined like coal.

 Uses of Common Salt –
Common salt is used to prepare various chemicals by the Electrolysis of BRINE –
(CHLOR ALKALI PROCESS) :
I. Caustic soda (NaOH)
II. Chlorine gas
III. Hydrogen gas.

 CHLOR ALKALI PROCESS-

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