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प्रश्न
What happens when
NH3 solution is added to CuSO4 solution drop by drop and then in excess.
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उत्तर
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)
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संबंधित प्रश्न
Explain the following:
An all-glass apparatus is used in the laboratory preparation of nitric acid.
Give two chemical equations for the following:
Reactions of nitric acid with non-metals.
Give two chemical equations for the following:
Nitric acid acting as the oxidizing agent.
How will you prepare the following from nitric acid?
Lead nitrate
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
The action of heat on the blue crystalline solid X gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.
- Identify X, Y and Z.
- Write the equation for the action of heat on X.
- Write the equation between solution X and gas Z.
How will you prepare Aqua regia from nitric acid?
Name the gas evolved:
The gas produced on heating sodium nitrate.
Write a balanced equation for following :
Reaction of ammonia with nitric acid
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.
