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प्रश्न
State your observations when ammonium hydroxide solution is added drop by drop and then in excess to the following solution:
Copper sulphate solution
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उत्तर
When NH4OH is added to copper sulphate solution drop-wise, a pale blue ppt. is obtained.
\[\ce{\underset{(Blue)}{CuSO4} + 2NH4OH -> \underset{(Pale blue ppt)}{Cu(OH)2\downarrow} + (NH4)2SO4}\]
With the excess of NH4OH, the ppt. dissolves to give a deep blue solution of tetraamine copper(II)sulphate
\[\ce{Cu(OH)2 + (NH4)2SO4 + \underset{(In excess)}{2NH4OH} -> \underset{(Deep blue solution)}{\underset{Tetrammine copper (II) sulphate}{[Cu(NH3)4]SO4}} + 4H2O}\]
संबंधित प्रश्न
What happens when ammonia solution is added first dropwise and then in excess to the following solution:
ZnSO4
Write a balanced equation for this reaction.
Using ammonium hydroxide, how would you distinguish between the following pair of ions in solution?
Ferrous ion and Ferric ion.
Name the method used for preparation of the following salt from the list given below:
Zinc ion and Lead ion.
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution.Describe the effect of Adding ammonium hydroxide to each portion in turn till it is in excess.
How would you distinguish between Zn2+ and Pb2+ using ammonium hydroxide solution?
Write the observation for the following :
NH4OH is added first in a small quantity and then in excess to a solution of copper sulphate.
The following table shows the tests a student performed on four different aqueous solutions which are X,Y,Z and W. Based on the observations provided, Identify the cation present
|
Chemical Test |
Observation | Conclusion |
| To Solution X, ammonium hydroxide is added in minium quantity first and then in excess | A dirty white precipitate is formed which dissolves in excess to form a clear solution | (i) |
| To Solution Y, ammonium hydroxide is added in minimum quantity first and then in excess | A pale blue precipitate is formed which dissolves in excess to form a clear inky blue solution | (ii) |
| To solution W, A small quantity of sodium hydroxide solution is added and then in excess | A white precipitate is formed which remains insoluble | (iii) |
| To a salt Z, calcium hydroxide solution is added and then heated | A pungent smelling gas turning moist red litmus paper blue is obtained | (iv) |
Identify the cation of the following case:
NaOH solution when added to solution (A) gives a reddish brown precipitate
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
