Reaction of dysprosium with acids
Dysprosium metal dissolves readily in dilute sulphuric acid, forming Dy(III) ions (yellow complex with water) and hydrogen gas, H2. It has been suggested that the complex is mostly [Dy(H2O)9]3+
2 Dy(s) + 3 H2SO4(aq) 2 Dy3+(aq) + 3 SO42−(aq) + 3 H2(g)
Reaction of dysprosium with air
Dysprosium metal tarnishes slowly in air and burns readily, forming dysprosium(III) oxide, Dy2O3.3
4 Dy(s) + 3 O2(g) 2 Dy2O3(s)
Reaction of dysprosium with halogens
Dysprosium reacts with all the halogens, forming the corresponding dysprosium(III) halides.
2 Dy(s) + 3 F2(g) 2 DyF3(s) [green]
2 Dy(s) + 3 Cl2(g) 2 DyCl3(s) [white]
2 Dy(s) + 3 Br2(g) 2 DyBr3(s) [white]
2 Dy(s) + 3 I2(g) 2 DyI3(s) [green]
Reaction of dysprosium with water
Dysprosium reacts slowly with cold water, and quite quickly with hot water, forming dysprosium hydroxide, Dy(OH)3, and hydrogen gas (H2).
2 Dy(s) + 6 H2O(g) 2 Dy(OH)3(aq) + 3 H2(g)