Question

Copper reacts with dilute nitric acid to give copper nitrate, nitric oxide and water.
Calculate :-
1. The mass of copper needed to react with 126 g of nitric acid.
2. Volume of nitric oxide obtained at the same time.
(Hint: mass of copper is 64g)​

Answer 1

Copper reacts with cold and dilute nitric acid to yield copper nitrate, water and nitric oxide.

3Cu+ (Dilute)8HNO 3 ⟶ (Copper nitrate)3Cu(NO 3 ) 2 +4H 2 O+ (Nitric oxide)2NO

The formed nitric oxide combines with the oxygen of air to give brown fumes of NO

2 .2NO+O 2 ⟶ (Brown fumes)2NO 2

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