Molybdenum: reactions of elements

Reaction of molybdenum with air

At room temperature, molybdenum does not react with air or oxygen, O2. At elevated temperatures (red heat), the trioxide molybdenum(VI) oxide, MoO3, is formd.

2Mo(s) + 3O2(g) → 2MoO3(s)

Reaction of molybdenum with water

At room temperature, molybdenum does not react with water.

Reaction of molybdenum with the halogens

Molybdenum reacts directly with fluorine, F2, at room temperature to form molybdenum(VI) fluoride, MoF6. The conditions are much milder than those required for chromium (immediately above molybdenum in the periodic table).

Mo(s) + 3F2(g) → MoF6(l) [colourless]

Under carefully controlled conditions, molybdenum(V) fluoride, MoF5, is formed in the reaction between molybdenum metal and chlorine, Cl2.

2Mo(s) + 5Cl2(g) → 2MoCl5(s) [black]

Reaction of molybdenum with acids

Reaction of molybdenum with bases

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