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प्रश्न
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.
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उत्तर
Ammonium Hydroxide :
| Small amount | In excess | |
| Calcium nitrate | No visible reaction | No change |
| Zinc nitrate | White precipitate | Soluble |
| Lead nitrate | White precipitate | Soluble |
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संबंधित प्रश्न
State your observations when ammonium hydroxide solution is added drop by drop and then in excess to each of the following solutions :
1) Copper sulphate solution
2) Zinc sulfate solution.
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.
You are provided with PbCO3, ZnCO3 and CaCO3. How will you identify these cations?
Fill in the blank.
The salt which will not react with NH4OH solution ______[ZnCl2, CuCl2 / NH4Cl/ FeCl2]
How would you distinguish between Zn2+ and Pb2+ ions, using ammonium hydroxide solution?
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:
NH4OH solution when added to solution (B) gives white ppt. which does not dissolve in excess.
Write a balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
Identify the cation in the following case:
Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.
Write balanced equation:
Copper sulphate solution with ammoni um hydroxide solution.
