Interaction | Reaction | Process     Data Page

The green, mixed ligand, dichlorotetraaquachromium(III) ion reacts with granulated zinc and aqueous hydrochloric acid to give a solution of hexaaquachromium(II) ion which is blue.

Air must be kept out of the reaction or the blue Cr(II) will be oxidised back to green Cr(III)
[CrCl2(H2O)4]+
  +  
Zn
  +  
2
H2O
         

[Cr(H2O)6]2+
  +  
Zn2+
  +  
2
Cl–
Reactant Page Go To Go To
Dichlorotetraaquachromium(III) ion     Reactions Using    Reactions Forming
Zinc     Reactions Using    Reactions Forming
Water     Reactions Using    Reactions Forming
Hexaaquachromium(II) ion     Reactions Using    Reactions Forming
Zinc ion     Reactions Using    Reactions Forming
Chloride ion     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
British A-Level Chemistry: A2
Ligand Exchange (Inorganic)
Redox
Reduction: Of Substrate By Reagent

© Mark R. Leach 1999 –

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