F2 + H2 → 2 HF – Balanced equation

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This is an oxidation-reduction (redox) reaction:

2 F + 2 e^- → 2 F^-I (reduction)

2 H - 2 e^- → 2 H^I (oxidation)

F₂ is an oxidizing agent, H₂ is a reducing agent.

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Reactants:

F₂
- Names: Fluorine , Fluorine-19
- Appearance: Yellow compressed gas with pungent odour ; Pale-yellow to greenish gas with a pungent, irritating odor.
H₂
- Names: Dihydrogen , Hydrogen , H2
- Appearance: Odourless colourless compressed gas

Products:

HF – Fluorane
- Other names: Hydrofluoric acid , Hydrogen fluoride , Fluorhydric acid
- Appearance: Colorless solution ; Colourless gas or colourless liquid (below 19.5 °C) ; Colourless gas or colourless fuming liquid with pungent odour ; Colourless fuming liquid with pungent odour ; Colorless gas or fuming liquid (below 67°F) with a strong, irritating odor. [Note: Shipped in cylinders.]