Advertisements
Advertisements
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
Advertisements
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
APPEARS IN
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?
Using ammonium hydroxide, how would you distinguish between the following pair of ions in solution?
Ferrous ion and Ferric ion.
Choose the correct answer from the options given below :
Which salt solution is soluble in excess of NH4OH
State what do you observe when:
Ammonium hydroxide is added to iron (III) sulphate solution.
Distinguish between the following pair of compound using the test given within bracket.
Iron (II) sulphate and iron (III) sulphate (using ammonium hydroxide)
Write the observation for the following :
NH4OH is added first in a small quantity and then in excess to a solution of copper sulphate.
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.
The salt solution which does not react with ammonium hydroxide is ______.
