bleaching powder. Bleaching powder is produced by the action of chlorine on dry slaked lime([Ca(OH)2). Bleaching powder is represented by formula CaOCl2 though the actual composition is quite complex.
Ca (OH)2+ Cl2J CaOCl2+ H2O

Uses of Bleaching Powder:

1. It is used for bleaching cotton and linen in the textile industry for bleaching wood pulp in paper industry and for bleaching washed clothes in laundry. 2. Used as an oxidizing agent in many chemical industries. 3. Used for disinfecting drinking water to make it free of germs. 4. Used as a reagent in the preparation of chloroform.

Baking soda

Baking soda is sometimes added for faster cooking. The chemical name of the compound is sodium hydrogen carbonate (NaHCO3). It is prepared as follows:
NaCl + H2O + CO2+ NH3J- NH4Cl + NaHCO3
Can you find the pH of sodium hydrogen carbonate as you have done in activity-14? Can you predict the reason for using NaHCO3 to neutralize an acid?
Baking soda is a mild non-corrosive base. The following reaction takes place when it is heated during cooking

Uses of sodium hydrogen carbonates

1) Baking powder mainly contains NaHCO3 and its other components are Ca(H2PO4)2 and starch. NaHCO3 produces CO2 which rises through bubling dough into cake or bread. This results cake and bread are smooth and spongy.
2)Sodium hydrogen carbonate is also an ingredient in antacids. Being alkaline, it neutralizes excess acid in the stomach and provides relief.
3)It is also used as soda-acid in fire extinguishers.
4) It acts as mild antiseptic.

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