Advertisements
Advertisements
प्रश्न
Distinguish between the given pair of compounds using the test given within brackets:
Iron (II) sulphate and iron (III) sulphate (using ammonium hydroxide)
Advertisements
उत्तर १
On addition of ammonium hydroxide to iron sulphate (II), a dirty green precipitate of Fe(OH)2 is formed. A reddish-brown precipitate of Fe(OH)2 is produced when ammonium hydroxide is added to an iron sulphate (III) solution.
उत्तर २
Iron (II) sulphate (Fe2+ ion):
\[\ce{\underset{green}{FeSO4} + 2NH4OH -> \underset{dirty green ppt}{Fe(OH)2↓} + \underset{colourless sol.}{(NH4)2SO4}}\]
Iron (III) salt (Fe3+ ion):
\[\ce{Fe2(SO4)3 + 6NH4OH↓ -> \underset{reddish brown ppt.}{2Fe(OH3)↓} + 3(NH4)2SO4}\]
संबंधित प्रश्न
Identify the cations in the following case :
NH4OH Solution, when added to the Solution (B), gives white ppt which does not dissolve in excess.
Identify the cations in the following case:
NaOH Solution, when added to Solution (C), gives white ppt which is insoluble in excess
Give balanced chemical equations for Reaction of ammonia with sulphuric acid.
Name the other ion formed when ammonia dissolves in water.
What do you observe when ammonium hydroxide is added to the aqueous solution of FeSO4? Write a balanced equation for this.
What do you observe when ammonium hydroxide is added to the aqueous solution of Iron (III) chloride? Write a balanced equation for this.
Why is ammonium hydroxide used in qualitative analysis? Give two equations to justify your answer.
When ammonium hydroxide is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide, giving an inky blue solution. What is the cation [positive ion] present in solution B? what is the probable colour of solution B?
Q. 24
Distinguish by a chemical test, sulphuric acid from nitric acid and hydrochloric acid.
