title: Rhodium(III) perchlorate
text: # Rhodium(III) perchlorate
  
  Rhodium(III) perchlorate refers to the inorganic compound with the formula $Rh(H_2O)_6(ClO_4)_3.$ It is a hygroscopic yellow solid. It is the perchlorate salt of the tricationic aquo complex $[Rh(H_2O)_6]^{3+}.$ The compound is prepared by treating hydrated rhodium(III) chloride and perchloric acid at elevated temperatures:
  
      $[Rh(H_2O)_6]Cl_3$ + 3 $HClO_4$ → $[Rh(H_2O)_6](ClO_4)_3$ + 3 HCl
  
  The reaction of rhodium(III) hydroxide with concentrated perchloric acid also produce rhodium(III) perchlorate.
  
      $Rh(OH)_3$ + 3 $HClO_4$ → $Rh(ClO_4)_3$ + 3 $H_2O$
  