-
Detailed information about the equation 2HNO3 + Cu -> 2NO2 + 2H2O + Cu(NO3)2
-
Conditions of the reaction
- The reaction occurs at normal temperature. If one wants to speed up the reaction, the temperature of the reaction environment can be increased.
- HNO3 needs to be concentrated and the copper needs to be pure.
-
Reaction process
- During the reaction process, nitric acid reacts with copper to produce nitrogen dioxide, water, and copper (II) nitrate.
- Specifically, 2 moles of nitric acid react with 1 mole of copper to produce 2 moles of nitrogen dioxide, 2 moles of water, and 1 mole of copper (II) nitrate.
-
Phenomena that occur
- During the reaction, we observe the phenomenon of brown gas (nitrogen dioxide) starting to rise from the solution.
- Copper gradually dissolves in the nitric acid solution, and the clear solution turns blue, which is the color of copper (II) nitrate.
- It is also possible to notice an increase in the temperature of the solution, indicating that this is an exothermic reaction.