Interaction | Reaction | Process     Data Page

When a little dilute hydroxide is added to a ruby-red solution of hexaaquachromium(III) ion, the complex cation acts as a Brønsted acid and loses three protons giving a green precipitate of the neutral complex triaaquatrihydroxychromium(III), and three water molecules.

[Cr(H2O)6]2+

  +  
3
NaOH(aq)
         

Cr(H2O)3(OH)3
Cr(OH)3

  +  
3
Na+
  +  
3
H2O
Reactant Page Go To Go To
Hexaaquachromium(III) ion     Reactions Using    Reactions Forming
Sodium hydroxide solution     Reactions Using    Reactions Forming
Triaquatrihydroxychromium(III)     Reactions Using    Reactions Forming
Sodium ion     Reactions Using    Reactions Forming
Water     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
British A-Level Chemistry: A2
Precipitation
Proton transfer: Brønsted reaction

© Mark R. Leach 1999 –


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