The above equation represents a chemical reaction between strong nitric acid (HNO3) and manganese(IV) oxide (MnO2). The result of this reaction is the formation of nitrogen dioxide (NO2), water (H2O), and manganese(II) nitrate (Mn(NO3)2).
- Reaction conditions:
This reaction typically occurs at room temperature and standard pressure. However, the reaction rate may increase if the temperature is raised.
- Reaction process:
During the reaction process, the molecules of HNO3 and MnO2 interact with each other to form the products NO2, H2O, and Mn(NO3)2. This process requires the supply of thermal energy to overcome the energy threshold and initiate the reaction.
- Occurring phenomena:
When the reaction occurs, changes in color and temperature can be observed. HNO3 is colorless and MnO2 is brownish black, while NO2 is reddish orange. Therefore, when the reaction takes place, the color of the mixture changes from colorless/brownish black to reddish orange. In addition, if the reaction occurs at a fast rate, heat may be generated, making the reaction mixture warm up.