Properties | More Info | Isotopes | Spectra
Compounds | Reactions | Production
Atomic: M.A.C. | Reference
Images | Video
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