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Ammonium Bicarbonate

AMMONIUM BICARBONATE

Ammonium Bicarbonate (NH4) HCO3 is a white, crystalline sand-line compound. One of the prominent applications of this salt is a smelling agent due to ammonia. It is a normally stable chemical substance. Ammonium Bicarbonate is volatile salt with an ammonia odour. It gives off a pungent smell when baked, as its common name is now baking soda. It serves as an acidity regulator, as ammonia is slightly more acidic. This inorganic compound is bicarbonate salt of ammonium ions. It is used in food processing.

Uses of Ammonium Bicarbonate

  • Cool baths at 17°C lowers it to 7°C.
  • In Europe, it is used as a leavening agent for baking goods.
  • It is used in fire extinguishers and pigments.
  • It is widely used in continental recipes.
  • It is used in the manufacturing of ceramics and porous plastics.
  • It is used as a blowing agent for foam rubber.
  • It has its applications in pharmaceuticals.

 

Preparation

It  is produced when carbon dioxide is passed through the aqueous ammonia. This is an endothermic reaction. 

Chemical Properties

 It is, a white crystalline powder, exhibits several notable chemical properties. Firstly, it’s highly soluble in water, undergoing dissociation to release ammonium ions (NH4+) and bicarbonate ions (HCO3−). This property makes it useful in various applications like baking, where it serves as a leavening agent. When heated, it decomposes into ammonia, carbon dioxide, and water, a process utilized in baking to produce gas, causing dough to rise. Additionally, it  is thermally unstable, decomposing readily at elevated temperatures. This instability makes it unsuitable for applications requiring long-term storage or exposure to heat. Moreover, it acts as a weak acid in solution, capable of reacting with bases to form ammonium salts. However, despite its versatility, it  poses some challenges due to its odor of ammonia and its tendency to release carbon dioxide gas upon decomposition, requiring careful handling in certain contexts.

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