Chemical reactions

Reaction of platinum with air

Platinum metal does not normally react with air.

Reaction of platinum with halogens

Platinum will react with F2, Cl2, Br2 and I2 forming platinum halides.

For fluorine, at mixture of platinum(VI) fluoride, PtF6, and the tetrameric platinum(V) fluoride, (PtF5)4 is formed, depending on the reaction conditions. The tetrameric platinum(V) fluoride disproportionates into platinum(VI) fluoride and platinum(IV) fluoride, PtF4:

Pt(s) + 3 F2(g) PtF6(s) [dark red]
4 Pt(s) + 10 F2(g) (PtF5)4(s) [deep red]
(PtF5)4(s) PtF6(s) + PtF4(s) [yellow brown]

For chlorine Pt(II)chloride and Pt(IV)chloride is formed, depending on reaction conditions. Pt(II)chloride comes in two forms.

Pt(s) + Cl2(g) PtCl2(s) [brown black]
Pt(s) + 2 Cl2(g) PtCl4(s) [dark red or olive green]

For bromine and iodine, Pt(IV)halides formed.

Pt(s) + 2 Br2(g) PtBr4(s) [brown black]
Pt(s) + 2 I2(g) PtI4(s) [brown black]

Reaction of platinum with hydrogen

Platinum does not react with hydrogen, but hydrogen can be dissolved in platinum [5].

Reaction of platinum with water

Platinum metal does not normally react with water.