Quiz on Preparation of Washing Soda and Baking Soda

The video tutorial explains the preparation of washing soda (sodium carbonate decahydrate) and baking soda (sodium bicarbonate) using caustic soda (NaOH) as the raw material. It details the laboratory setup and the chemical reactions involved, including the generation of carbon dioxide from limestone and hydrochloric acid, and its subsequent reactions to form sodium carbonate and sodium hydrogen carbonate. The process of converting sodium hydrogen carbonate to sodium carbonate and finally to washing soda through crystallization is also covered.

What is the chemical formula for washing soda?

• Na2CO3·10H2O

• NaHCO3

• CaCO3

• NaOH

What is the chemical formula for baking soda?

• NaOH

• Na2CO3·10H2O

• NaHCO3

• CaCO3

Which raw material is used in the preparation of washing soda and baking soda?

• Hydrochloric acid

• Caustic soda

• Sodium bicarbonate

• Limestone

What is the role of hydrochloric acid in the preparation process?

• To dissolve sodium carbonate

• To crystallize washing soda

• To neutralize sodium hydroxide

• To generate carbon dioxide gas

What is formed when carbon dioxide is passed through concentrated sodium hydroxide solution?

• Sodium bicarbonate

• Sodium carbonate

• Hydrochloric acid

• Calcium carbonate

How is sodium hydrogen carbonate separated from water?

• By heating

• By crystallization

• By filtration

• By evaporation

Which compound is sparingly soluble in water and can be filtered off?

• Sodium hydrogen carbonate

• Sodium hydroxide

• Calcium carbonate

• Sodium carbonate

What happens when sodium hydrogen carbonate is heated?

• It forms carbon dioxide

• It forms washing soda

• It forms sodium carbonate

• It forms water

What is the final product obtained by cooling the solution after heating sodium carbonate?

• Sodium hydroxide

• Calcium carbonate

• Sodium bicarbonate

• Washing soda