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प्रश्न
What happens when
Caustic soda solution is added to Cu(NO3)2 solution and product boiled.
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उत्तर
When Caustic soda solution is added to Cu(NO3)2 solution, the following reaction takes place:
Cu(NO3)2(aq) + 2NaOH(aq) → Cu(OH)2(S) + 2NaNO3(aq)
When we heat it further, the greenish blue copper hydroxide decomposes to form slightly black ppt. of copper oxide.
\[\ce{Cu(OH)2(S) ->[\Delta] CuO(s) + H2O(g)}\]
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संबंधित प्रश्न
State one relevant observation for the following:
When crystals of copper nitrate are heated in a test tube.
Write a balanced equation for the action of warm water on magnesium nitride.
Name the gas that is produced in the given case:
The action of cold and dilute nitric acid on copper
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What is : aqua regia
- Write a balanced chemical equation for the laboratory preparation of nitric acid.
- In the preparation of nitric acid from KNO3, concentrated hydrochloric acid is not used in place of concentrated sulphuric acid. Explain why?
- Conc. nitric acid prepared in the laboratory is yellow in colour. Why? How is this colour removed?
- Give reasons for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly above 200°C.
Name the Following:
Product obtained by the catalytic oxidation of ammonia.
Write balanced equation to show the reaction between the sulphur and hot concentrated nitric acid.
Fill in the blank using the appropriate words given below:
Hot, concentrated nitric add reacts with sulphur to form ______.
Write sqauential observation for effect of heat on Copper nitrate.
