Advertisements
Advertisements
प्रश्न
Ammonia solution in water gives a blue precipitate when it combines with a solution of copper salt. The blue precipitate further dissolves in excess of an ammonia solution to give the azure blue solution. Explain with the equation.
उत्तर
\[\ce{NH3 + H2O <=> NH4OH}\]
\[\ce{CuSO4 + 2Nh4OH -> \underset{(Pale Blue ppt)}{[NH4SO4]} + Cu[OH]2↓}\]
The pale blue ppt. of copper hydrogen dissolves in excess of Ammonium hydroxide forming an Azure blue (deep blue) soluble complex salt. [Tetra amine copper II] Sulphate \[\ce{[Cu(NH3)4]SO4}\] is formed.
\[\ce{\underset{[Pale blue ppt.]}{Cu(OH)2} + \underset{(Amm. Hydroxide)}{(NH3)2SO4 + 2NH4OH} -> \underset{(Deep blue colouration)}{\underset{[Tetra amine copper II sulphate]}{[Cu(NH3)4SO4 + Cu(OH)2↓}}}\]
APPEARS IN
संबंधित प्रश्न
The acid which is prepared by catalytic oxidation of ammonia.
Ammonia gas is passed over heated copper (I) oxide.
Name the following
Salt used to clean metal surface before soldering, tinning, etc.
Ammonia is manufactured by Haber Process.
In what ratio by volume, are the above reactants used.
Name the substance used for drying ammonia gas? Why cannot substances such as conc.H2SO4, anhydrous calcium chloride and phosphorus pentoxide be used for drying ammonia gas?
Give balanced reactions for the following conversion:
Ammonia solution to an amphoteric hydroxide.
Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:
Pb(NO3)2
Choose the correct answer from the options given below :
Ammonia reacts with excess chlorine to form
The catalyst used in the oxidation of ammonia is ______.
