Iron (III) oxide reacted with nitric acid. The resulting solution was evaporated, the resulting salt was calcined.

Iron (III) oxide reacted with nitric acid. The resulting solution was evaporated, the resulting salt was calcined. The solid residue was treated with hydroiodic acid. The resulting simple substance reacted with a concentrated solution of sodium hydroxide upon heating. Write the equations for the four reactions described.

Fe2O3 + 6HNO3 = 2Fe(NO3)3 + 3H2O
4Fe(NO3)3 -> 2Fe2O3 + 12NO2 + 3O2
Fe2O3 + 6HI = 2FeI2 + I2 + 3H2O
3I2 + 6NaOH -> 5NaI + NaIO3 + 3H2O

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