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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
Write balanced chemical equations for the following:
An equation to illustrate the reducing nature of ammonia.
State the conditions required for the given reaction to take place:
Catalytic oxidation of ammonia to nitric oxide.
explain catalytic oxidation of ammonia.
Name the following
Solid obtained by passing ammonia over heated copper oxide
Write a balanced chemical equation for the following:
An equation to illustrate the reducing nature of ammonia.
Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:
CrCl3
Complete and balance the equation: CuO(heated) + NH3 →
Copy and complete the following equations :
(i) Mg3N2 + 6H2O →
(ii) 2NH3 + 3CuO →
(iii) 8NH3 + 3Cl2 →
(iv) 4NH3 + 5O2 →
A compound which undergoes thermal dissociation.
