ICSE Class 10 Answered
Plz explain
Asked by lovemaan5500 | 10 Feb, 2018, 06:10: PM
Expert Answer
Qualitative analysis is a method of determination of the composition of given or unknown compound.
We have used ammonium hydroxide in the qualitative analysis because it gives a different coloured precipitate with different metallic salts, from obtained colour we can be identified which cation is present in given sample.
example:
1) Iron
(A) Iron (II) salt [Fe2+ ion]FeSO4 + 2NH4OH → Fe(OH)2 + (NH4)2SO4
(dirty green ppt.) (colourless)
(B) Iron (III) salt [Fe3+ ion]FeCl3 + 3NH4OH → Fe(OH)3 + 3NH4Cl
(reddish (colourless)
brown ppt.)
2) Copper (II) salt
2) Copper (II) salt
[Cu2+ion]CuSO4 + 2NH4OH → Cu(OH)2 + (NH4)2SO4
(pale blue ppt.) (colourless in solution)
Answered by Ramandeep | 10 Feb, 2018, 07:18: PM
Concept Videos
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Uses of Ammonium Hydroxide and Sodium Hydroxide
Uses of Ammonium Hydroxide and Sodium Hydroxide, Action of Alkalis on Subst... -
Uses of Ammonium Hydroxide and Sodium Hydroxide
Uses of Ammonium Hydroxide and Sodium Hydroxide, Action of Alkalis on Subst...
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