The equation 6HNO3 + 2Fe -> 2Fe(NO3)3 + 6H2O + 2NO.

  1. Detailed information about the chemical equation:
    The chemical equation above describes the reaction between nitric acid (HNO3) and iron (Fe) to produce iron(III) nitrate (Fe(NO3)3), water (H2O), and nitrogen monoxide (NO).
    According to the stoichiometry of the equation, 6 moles of nitric acid need to react with 2 moles of iron to produce 2 moles of iron(III) nitrate, 6 moles of water, and 2 moles of nitrogen monoxide.

  2. Reaction conditions:
    The reaction is carried out in an acidic environment, at room temperature.

  3. Reaction process:
    When nitric acid reacts with iron, it produces iron(III) nitrate, water, and nitrogen monoxide. Iron is oxidized from the oxidation state of +2 to +3, while nitrogen in nitric acid is reduced from the oxidation state of +5 to +2.

  4. Phenomena that occur:
    When nitric acid reacts with iron, the color of the solution changes from colorless (or pale yellow if concentrated nitric acid is used) to brown due to the presence of nitrogen monoxide. Iron also gradually dissolves in the solution, creating a layer of iron(III) nitrate on the surface.

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