Use of bleaching powder:
Bleaching powder is used as disinfectant to clean water, moss remover, weed killers, etc.Bleaching powder is used for bleaching of cotton in textile industry, bleaching of wood pulp in paper industry.Bleaching powder is used as oxidizing agent in many industries, such as textiles industry, paper industry, etc.
Baking Soda (NaHCO3 )
Baking soda is another important product which can be obtained
using byproducts of chlor-alkali process. The chemical name of baking
soda is sodium hydrogen carbonate (NaHCO3 ) or sodium
bicarbonate. Bread soda, cooking soda, bicarbonate of soda, sodium
bicarb, bicarb of soda or simply bicarb, etc. are some other names of
Baking soda is obtained by the reaction of brine with carbon dioxide and ammonia. This is known as Solvay process.
NaCl + CO2 + NH3 + H2O ⇨ NH4Cl + NaHCO3
In this process, calcium carbonate is used as the source of CO2 and the resultant calcium oxide is used to recover ammonia from ammonium chloride.
Properties of sodium bicarbonate:
Sodium bicarbonate is white crystalline solid, but it appears as fine powder.Sodium hydrogen carbonate is amphoteric in nature.Sodium hydrogen carbonate is sparingly soluble in water.Thermal decomposition of sodium hydrogen carbonate (baking soda).When baking soda is heated, it decomposes into sodium carbonate, carbon dioxide and water.
Common Salt (SoUse of Baking Soda:
Baking soda is used in making of baking powder, which is used in
cooking as it produces carbon dioxide which makes the batter soft and
spongy.Baking soda is used as antacid.Baking soda is used in toothpaste which makes the teeth white and plaque free.Baking soda is used in cleansing of ornaments made of sliver.Since, sodium hydrogen carbonate gives carbon dioxide and sodium oxide on strong heating, thus it is used as fire extinguisher
Sodium chloride (NaCl) is also known as common or table salt. It
is formed after the reaction between sodium hydroxide and hydrochloric
acid. It is a neutral salt. The pH value of sodium chloride is about 7.
Sodium chloride is used to enhance the taste of food. Sodium chloride is
used in manufacturing of many chemicals.
Important chemicals from sodium chloride:
Sodium Hydroxide (NaOH): Sodium hydroxide is a
strong base. It is also known as caustic soda or Iye. It is obtained by
the electrolytic decomposition of solution of sodium chloride (brine).
In the process of electrolytic decomposition of brine (aqueous solution
of sodium chloride), brine decomposes to form sodium hydroxide. In this
process, chlorine is obtained at anode and hydrogen gas is obtained at
cathode as byproducts. This whole process is known as Chlor-Alkali
2NaCl + 2H2O ⇨ 2NaOH + Cl2 + H2