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प्रश्न
Write the observation, and balanced equation for the following reaction:
Ammonium hydroxide is added first in a small quantity, and then in excess, to a solution of copper sulphate.
उत्तर
When ammonium hydroxide is added in small quantity to copper sulphate solution; it gives blue precipitate of Cu(OH)2
\[\ce{\underset{\text{Blue}}{CuSO4} + 2NH4OH ->\underset{\text{Pale blue ppt.}}{Cu(OH)2} + (NH4)2SO4}\]
When ammonium hydroxide is added in excess, the blue precipitate dissolves giving deep blue solution of tetra amine copper sulphate.
\[\ce{Cu(OH)2 + (NH4)2SO4 +\underset{\text{In excess}}{2NH4OH} ->\underset{\text{Tetrammine copper( II)
Sulphate (Deep blue solution)}}{[Cu(NH3)4]SO4} +4H2O}\]
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संबंधित प्रश्न
What happens when ammonia solution is added first dropwise and then in excess to the following solution:
CuSO4
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?
Name the metal hydroxides which are soluble in ammonium hydroxide solution.
Distinguish between the following pair of compounds using the test given within bracket.
A lead salt and a zinc salt (using excess ammonium hydroxide)
How would you distinguish between Zn2+ and Pb2+ using ammonium hydroxide solution?
Write the observation for the following:
NaOH is added drop-wise till in excess to a solution of zinc sulphate.
Identify the cation of the following case:
NaOH solution when added to solution (C) gives white ppt. which insoluble in excess.
What do you observe when caustic soda solution is added to the following solution: first a little and then in excess:
CuSO4
Write a balanced equation for this reaction.
Write a balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
A ______ coloured precipitate is formed when ammonium hydroxide is added to a solution of ferrous chloride.
