Chemistry
The diagram shows set up for the lab. preparation of a pungent alkaline gas.
(i) Name the gas collected in the jar.
(ii) Give a balanced equation for the above preparation
(iii) State how the above gas is collected?
(iv) Name the drying agent used.
(v) State how you will find out that the jar is full of the pungent gas?
Ammonia
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Answer
(i) Ammonia (NH3) gas is collected.
(ii) 2NH4Cl + Ca(OH)2 ⟶ CaCl2 + 2H2O + 2NH3
(iii) Downward displacement of air is the method used to collect the gas.
(iv) Quicklime (CaO) is the drying agent.
(v) A glass rod dipped in conc. HCl acid is brought near the mouth of the jar. If the jar is full-dense white fumes of ammonium chloride are formed.
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