This is an acid-base reaction (neutralization): HNO3 is an acid, Fe(OH)2 is a base.
Reactants:
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HNO3 – Nitric acid
Other names: Aqua fortis, Spirit of niter, Eau forte
Appearance: Colorless, yellow or red fuming liquid ; Colourless-to-yellow liquid with pungent odour ; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.]
Fe(OH)2 – Iron(II) hydroxide
Other names: Ferrous hydroxide
Appearance: Green solid
Products:
Fe(NO3)2
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxide
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
2 → Fe(NO3)2 + 2 H2O – Balanced equation){kind=link}