| Reactions of Praseodymium |
 Reactions with water |
| Praseodymium is quite electropositive and reacts slowly with cold water and quite quickly with hot water to form praseodymium
hydroxide and hydrogen gas.
|
2Pr(s) + 6H2O(g) 2Pr(OH)3(aq) + 3H2(g) |
| Reactions with air |
| Praseodymium tarnishes slowly in air and burns readily to form a praseodymium oxide which has the approximate formula Pr6O11.
|
| 12Pr(s) + 11O2(g)2Pr6O11(s) |
| Reactions with halogens |
| Praseodymium reacts with all the halogens to form praseodymium(III) halides. |
| 2Pr(s) + 3F2(g)2PrF3(s) |
| 2Pr(s) + 3Cl2(g)2PrCl3(s) |
| 2Pr(s) + 3Br2(g)2PrBr3(s) |
| 2Pr(s) + 3I2(g)2PrI3(s) |
| Reactions with acids |
| Praseodymium dissolves readily in dilute sulphuric acid to form solutions containing the green aquated Pr(III) ion together with hydrogen gas.
|
| 2Pr(s) + 3H2SO4(aq)2Pr3+(aq) + 3SO42-(aq) + 3H2(g) |
