Question

what happen when nitric acid react with zn or cu in different concentration?

Answer 1

HNO3 + Cu = Cu(NO3)2 +NO2+ H20

HNO3 + Zn = Zn(NO3)2 + NO2 + H20

Answer 2

The results of Zn or Cu reactions with nitric acid at various concentrations are different.

1. The interaction between zinc or copper and weak nitric acid is as simple as:

        4Zn + 10HNO₃ → 4Zn(NO₃)₂ + N₂O + 5HO

   When Zn or Cu reacts with weak nitric acid, they generate Nitrous oxide.

2. The following is the reaction of zinc or copper with strong nitric acid:

        Zn+4HNO₃(conc.) → Zn(NO₃ )₂  +2NO₂  +2H₂O

Zinc produces nitrogen dioxide in the presence of concentrated nitric acid.

• Because concentrated nitric acid is a powerful oxidizing agent and zinc is a good reducing agent, a violent reaction is likely.
• A wide range of products can be formed depending on the temperature of the reaction mixture, and numerous processes can occur at the same time. Overall, it's a complicated set of reactions with different stoichiometry depending on the situation.