Question

Lab preparation of ammonia gas

Answer 1

In the laboratory, a mixture of Ca(OH)2 & NH4Cl is heated in order to produce NH3 gas. In this reaction CaCl2 & water vapor is also produced.

Description of the process: A certain mass of NH4Cl & double of it’s mass of Ca(OH)2 is taken in a boiling tube. A delivery tube is fitted to the mouth of the boiling tube using a cork, & the boiling tube is clamped to a stand.

The open end of the delivery tube is fitted to the lower end of a tower containing dry CaO, which is being used here as a drying agent. Finally, the side tube at the upper part of the tower is inserted into a dry & inverted gas jar.

Now, if the mixture in the boiling tube is heated slowly, wet NH3 is produced.

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Answer 2

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♣♣LAB PREPARATION OF AMMONIA (NH3).♣♣

✔✔REACTANTS -->(NH3)2SO4,NAOH.

✔✔PRODUCTS ---->H2O, NA2SO4, NH3.

♣♣♣EQUATION..... ♣♣♣♣

ON HEATING.....

(NH3)2SO4 +NAOH---->NA2SO4+H2O+NH3⬆



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