(36) Write preparation and uses of Washing Soda
answer the following questions 35 to 39 in detail in the limit of 90 to 120 words
Answers
Answer:
Washing soda is used for removing burnt-on grease from kitchen utensils. It is prominently used in soap, glass and paper industries. It also helps in the removal of permanent hardness of the water. It acts as a raw material in the manufacturing of various sodium compounds, for example, borax.
Explanation:
pls mark as brainliest
Answer:
Sodium carbonate or washing soda
Formula: Na2CO3
Properties:
Sodium carbonate is a white crystalline solid, which can exists as anhydrous salt (Na2CO3), monohydrate salt (Na2CO3.H2O), heptahydrate salt (Na2CO3.7H2O) and decahydrate (Na2CO3.10H2O - washing soda). Sodium carbonate is readily soluble in water. On heating, the decahydrate salt gradually loses water and finally give anhydrous salt (Na2CO3 - soda ash).
Uses of sodium carbonate or washing soda
1. For the manufacture of glass.
2. For washing purposes in laundries.
3. As a household cleansing agent.
4.. For the softening of water.
5. In paper and soap/detergent industries.
Manufacturing of sodium carbonate
Sodium carbonate is prepared by solvay process. In this process, CO2 is bubbled through the solution of brine saturated with ammonia when hydrogen carbonate precipitates due to common ion effect.