Answer to Question #153332 in Inorganic Chemistry for Djoukang Temfack Samanta Samira

Question #153332

Using equations only, Show how

(i) Ammonia can be prepared in the laboratory

(ii) A fertiliser can be prepared from a nitrogen compound with oxidation states -3 and +5


1
Expert's answer
2021-02-09T03:18:16-0500

(i) Ammonia is easily made in the laboratory by heating an ammonium salt, such as ammonium chloride NH4Cl with a strong alkali, such as sodium hydroxide or calcium hydroxide.

2NH4Cl + Ca(OH)2 → CaCl2 + 2H2O + 2NH3(g)


OR

by warming concentrated ammonium hydroxide


NH4OH(aq) NH3(g) + H2O(l)


(ii) The only fertilizer with two nitrogens one with +5 and the other -3 oxidation states is NH4N2O5. It can be prepared in the following reaction.

10As  +  12HNO3  →  5As2O3  +  3NO2  +  3NH4N2O5



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