Reactions with waterReactions with air
2Rh2O3(s)Reactions with halogens2RhF3(s)2RhCl3(s)2RhBr3(s)RhF6(s)Reactions with acids|
Compounds | Reactions | Production
|
| Reactions of Rhodium |
| Reactions with water |
| Rhodium does not react with water under standard conditions. |
| Reactions with air |
| Rhodium is generally inert in air, when heated with oxygen at 600°C rhodium(III) oxide is produced. |
| 4Rh(s) + 3O2(g)2Rh2O3(s) |
| Reactions with halogens |
| Under anhydrous conditions rhodium will form trihalides with fluorine, chlorine and bromine. |
| 2Rh(s) + 3F2(g)2RhF3(s) |
| 2Rh(s) + 3Cl2(g)2RhCl3(s) |
| 2Rh(s) + 3Br2(l)2RhBr3(s) |
| Rhodium reacts directly with fluorine gas to form the highly corrosive rhodium(VI) fluoride. |
| Rh(s) + 3F2(g)RhF6(s) |
| Reactions with acids |
| Rhodium is reknowned for being inert to acids, including aqua regia. |
| Reduction Potentials | |
| Balanced half-reaction | E0 / V |
Rh3+ + 3e- Rh(s) |
+0.8 |
| RhCl63- + 3e-Rh(s) + 6Cl- |
+0.44 |
| Rh2O3(s) + 6H+ + 6e-2Rh(s) + 3H2O
|
+0.87 |
| RhO2 + 4H+ + 6Cl- + e-RhCl63- + 2H2O
|
+1.4 |
| RhO2+ + 2H+ + e-Rh3+ + H2O
|
+1.40 |
| RhO42- + 6H+ + 2e-RhO2+ + 3H2O
|
+1.46 |