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प्रश्न
Why is ammonium hydroxide used in qualitative analysis? Give two equations to justify your answer.
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उत्तर
Ammonium hydroxide precipitates hydroxides of metals when it is added to aqueous solution of their salts. The precipitate of metal hydroxides differ in colour and solubility and hence ammonium hydroxide is used in qualitative analysis.
(i) FeSO4 +2NH4OH → (NH4)2SO4 +Fe(OH)3
The colour of precipitate is dirty green, which is insoluble in excess of
ammonium hydroxide.
(ii) CuSO4 + 2NH4OH → (NH4)2SO4 + Cu (OH)2
The colour of precipitate is bluish white, which is soluble in excess of ammonium hydroxide.
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संबंधित प्रश्न
Name the gas evolved in each of the following cases :
Ammonia reacts with heated copper oxide.
Name the following
Ammonium salt used in explosive.
State one possible source of each reactant used in the process.
Give balanced chemical equations for of the following :
Reaction of ammonia with excess chlorine.
Give a balanced chemical equation for the following:
Reaction of ammonia with sulphuric acid.
Choose the correct answer from the options given below :
Ammonia reacts with excess chlorine to form
Write the equations for the following reactions, which result in the formation of ammonia:
(i) A mixture of ammonium chloride and slaked lime is heated.
(ii) Aluminium nitride and water.
State one relevant observation for the following:
Burning of ammonia in excess of oxygen.
Ranjana wants to prove that ammonia is a reducing agent. To demonstrate this, she passes ammonia gas over heated copper oxide. What will she observe?
