Chemical reactions of the elements
Reaction of scandium with air
Scandium metal tarnishes in air and burns readily to form scandium (III) oxide, Sc2O3.
4Sc + 3O2 → 2Sc2O3
Reaction of scandium with water
When finely divided, or heated, scandium metal dissolves in water to form solutions containing the aquated Sc(III) ion together with hydrogen gas, H2.
2Sc(s) + 6H2O(aq) → 2Sc3+(aq) + 6OH-(aq) + 3H2(g)
Reaction of scandium with the halogens
Scandium is very reactive towards the halogens fluorine, F2, chlorine, Cl2 bromine, Br2, and iodine, I2, and burns to form the trihalides scandium(III) fluoride, ScF3 , scandium(III) chloride, ScCl3, scandium(III) bromide, ScBr3, and scandium(III) iodide, ScI3 respectively.
2Sc(s) + 3F2(g) → 2ScF3(s)
2Sc(s) + 3Cl2(g) → 2ScCl3(s)
2Sc(s) + 3Br2(g) → 2ScBr3(s)
2Sc(s) + 3I2(g) → 2ScI3(s)
Reaction of scandium with acids
Scandium metal dissolves readily in dilute hydrochloric acid to form solutions containing the aquated Sc(III) ion together with hydrogen gas, H2.
2Sc(s) + 6HCl(aq) → 2Sc3+(aq) + 6Cl-(aq) + 3H2(g)
Reaction of scandium with bases
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