The equation 4HNO3 + FeO -> 2NO2 + 2H2O + Fe(NO3)2

  1. Detailed information about the equation 4HNO3 + FeO -> 2NO2 + 2H2O + Fe(NO3)2:
  • The above equation describes the reaction between nitric acid (HNO3) and iron (II) oxide (FeO).
  • The products of the reaction include nitrogen dioxide (NO2), water (H2O), and iron nitrate (Fe(NO3)2).
  1. Reaction conditions:
  • The reaction occurs easily at room temperature and doesn’t require light or a catalyst.
  1. Reaction process:
  • In this reaction, nitric acid (HNO3) reacts with iron (II) oxide (FeO) to produce nitrogen dioxide (NO2), water (H2O), and iron nitrate (Fe(NO3)2).
  • This reaction is a redox reaction. Iron (II) oxide is oxidized to iron nitrate (Fe(NO3)2) and nitric acid (HNO3) is reduced to nitrogen dioxide (NO2).
  1. Observations:
  • When the reaction occurs, one can observe the color change of the mixture from the black of FeO to the reddish-brown of NO2 and the colorless of Fe(NO3)2 and H2O.
  • Simultaneously, the reaction also involves the release of hot gas.

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