OsO4 + 6 NH4Cl + 4 FeCl2 + 8 HCl → 4 NH4[FeCl4] + (NH4)2[OsCl6] + 4 H2O
This is a complexation reaction: NH4[FeCl4] and(NH4)2[OsCl6] is the formed complex.
This is an oxidation-reduction (redox) reaction:
OsVIII + 4 e- → OsIV (reduction)
4 FeII - 4 e- → 4 FeIII (oxidation)
OsO4 is an oxidizing agent, FeCl2 is a reducing agent.
Reactants:
- OsO4 – Osmium tetraoxide , Tetraoxoosmium
- Other names: Osmium tetroxide , Osmium(VIII) oxide , Osmic acid anhydride
- Appearance: White volatile solid ; Colourless-to-pale-yellow solid in various forms with pungent odour ; Colorless, crystalline solid or pale-yellow mass with an unpleasant, acrid, chlorine-like odor. [Note: A liquid above 105°F.]
- NH4Cl – Ammonium chloride
- FeCl2 – Iron(II) chloride , Iron dichloride
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
Products: