Question

what is baking soda? how it is prepared in laboutries? give two uses of it
Plz answer fast


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Answer 1

Baking Soda

Chemical Name: Sodium Hydrogen Carbonate

Formula: NaHCO₃

Preparation: It is prepared by adding carbon-dioxide to brine (common salt in water) along with ammonia.

NaCl + H₂O + CO₂ + NH3 ---------------> NaHCO₃ + NH₄Cl

Uses:

• Used in baking bread, cake etc. When it is heated, carbon-dioxide gas is given off, which causes the bread/cake batter to rise and become fluffy.

2NaHCO₃ -----heat--------> Na₂CO₃ + H₂O + CO₂

• Used in soda-acid fire extinguishers. This is again because it gives water and carbon-dioxide when it reacts with an acid.

NaHCO₃ + H⁺ (from any acid) ---------> Sodium salt of acid + H₂O + CO₂

Generally, H₂SO₄ is used.

2NaHCO₃ + H₂SO₄ ----------> Na₂SO₄ + 2H₂O + 2CO₂