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प्रश्न
Write the observation for the following :
NH4OH is added first in a small quantity and then in excess to a solution of copper sulphate.
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उत्तर
Dropwise addition of NH4OH:
\[\ce{CuSO4 + 2NH4OH -> \underset{\text{Blue ppt.}}{Cu(OH)2} + (NH4)2SO4}\]
with excess of NH4OH, the precipitate of copper(II) hydroxide dissolves as:
\[\ce{Cu(OH)2 + (NH4)2SO4 + \underset{\text{In excess}}{2NH4OH} -> \underset{\text{Tetrammine copper(II) sulphate}}{[Cu(NH3)4]SO4 + 4H2O}}\]
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संबंधित प्रश्न
What happens when ammonia solution is added first dropwise and then in excess to the following solution:
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Write a balanced equation for this reaction.
On adding dilute ammonia solution to a colourless solution of a salt, a white gelatinous precipitate appears. This precipitate however dissolves on addition of excess of ammonia solution. Identify (choose from Na, Al, Zn, Pb, Fe)
Which metal salt solution was used?
How will you distinguish NH4OH solution from NaOH solution?
Name the metal hydroxides which are insoluble in ammonium hydroxide solution.
Using ammonium hydroxide, how would you distinguish between the following pair of ions in solution?
Ferrous ion and Ferric ion.
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 a balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
