Colors of chemicals

ions in aqueous solution

name formula colour

   * alkali metals M+ none
   * alkaline earth metals M2+ none
   * scandium Sc3+ ??
   * titanium TiO2+ none
   * vanadate VO43- none
   * vanadyl VO2+ yellow
   * chrome(III) Cr3+ green
   * chromate CrO4 2- yellow
   * dichromate Cr2O72- orange
   * manganese(II) Mn2+ VERY light pink
   * permanganate MnO4- deep violet
   * manganate (VI) MnO4 2- green
   * manganate (V) MnO4 3- blue
   * iron(II) Fe2+ light green
   * iron(III) Fe3+ yellow/green/reddish
   * cobalt Co2+ light red
   * nickel Ni2+ green
   * copper Cu 2+ blue
   * copper-ammonia complex [Cu(NH3)4]2+ deep blue
   * Zinc Zn2+ none

Salts

   * copper vitriol (sulfate) CuSO4 none
   * copper vitriol hydrate CuSO4*5H2O blue
   * cobalt chloride CoCl2 deep blue
   * cobalt chloride hydrate CoCl2*nH2O light red

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