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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.
Give the reactions to explain what happens when ammonia solution is added drop by drop till it is in excess to the following solution:
ZnSO4
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उत्तर
Adding ammonium hydroxide drop by drop to zinc sulphate solution forms a white gelatinous precipitate of zinc hydroxide.
\[\ce{\underset{\text{Colourless}}{ZnSO4} + 2NH4OH ->\underset{\text{White, gelatinous ppt.}}{Zn(OH)2\downarrow} + \underset{\text{colourless}}{(NH4)2SO4}}\]
Adding excess ammonium hydroxide dissolves the precipitate to form a clear, colourless complex solution.
\[\ce{\underset{Excess}{Zn(OH)2} + 4NH4OH -> \underset{(Colourless solution)}{\underset{Tetra-ammine zinc (II) hydroxide}{[Zn(NH3)4](OH)2}} + 4H2O}\]
Notes
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संबंधित प्रश्न
State your observations when ammonium hydroxide solution is added drop by drop and then in excess to the following solution:
Copper sulphate solution
What happens when ammonia solution is added first dropwise and then in excess to the following solution:
CuSO4
Write a balanced equation for this reaction.
How would you distinguish between Zn2+ and Pb2+ ions, using ammonium hydroxide solution?
State two relevant observations of the following:
Ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess.
Write the observation for the following:
Excess NH4OH is added to a substance obtained by adding hydrochloric acid in silver nitrate solution.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
______ is a white precipitate that is soluble in excess of Ammonium hydroxide solution.
Write balanced equation :
Copper sulphate solution with ammonium hydroxide solution.
Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts.
- To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate.
- To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate.
Name:
- The cation present and
- The anion present in the salt given for identification.
