Advertisements
Advertisements
Question
What happens when
NH3 solution is added to CuSO4 solution drop by drop and then in excess.
Advertisements
Solution
When NH3 solution is added to CuSO4 solution drop by drop, ammonia ions completely react with copper sulphate and precipitates of copper hydroxide are formed.
CuSO4(aq) + 2NH3(aq) + 2H2O(I) → Cu(OH)2(s) + (NH4)2SO4(aq)
But when we add excess of ammonia, the precipitate dissolves and a soluble complex is formed.
CuSO4(aq) + 4NH3(aq) → [Cu(NH3)4]SO4(aq)
APPEARS IN
RELATED QUESTIONS
Ammonia is used in the Ostwald process.
What is the ratio of ammonia and air taken in this process?
Name the following :
Gas produced in air during lighting.
Explain with the help of a balanced equation, the brown ring test for nitric acid.
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
Give reason for the following:
Aqua regia dissolves gold and platinum.
Write balanced equation and name the product formed when :
Cupric oxide reacts with nitric acid.
What do you observe when?
Concentrated nitric acid is dropped on a hot surface?
Give the name of a soluble lead salt and write the eqution for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid.
- Name A (a liquid), B (a solid), and C (a liquid). (Do not give the formulae.)
- Write an equation to show how nitric acid undergoes decomposition.
- Write the equation for the reaction in which copper is oxidised by concentrated nitric acid.
