The equation Fe + 4HNO3 -> 2Fe(NO3)3 + 4NO2 + 4H2O

  1. Detailed information about the equation Fe + 4HNO3 -> 2Fe(NO3)3 + 4NO2 + 4H2O:
    This is a chemical equation describing the reaction process between iron (Fe) and concentrated nitric acid (HNO3), resulting in the formation of iron (III) nitrate (Fe(NO3)3), nitrogen dioxide (NO2) and water (H2O).

  2. Reaction conditions:
    This reaction occurs when iron comes into contact with concentrated nitric acid.

  3. Reaction process:

    • Step 1: Iron reacts with nitric acid to form iron (III) nitrate.
    • Step 2: The reaction process continues as iron (III) nitrate reacts with nitric acid to produce nitrogen dioxide and water.

  4. Phenomena:
    When iron comes into contact with concentrated nitric acid, brown gas bubbles (nitrogen dioxide) start to escape. Meanwhile, the initial solution gradually turns orange due to the formation of iron (III) nitrate.

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