Element -Flame Color
Cu - green
Li - red
K - violet
Sr - scarlet
Na - yellow
Ca - orange-red
Ba - yellow-green
Cs - deep violet
Ions
Ion - Color
Mn2+ - pink
MnO?41- - purple
Cr3+ - dark green
CrO?41- - yellow
Cr2O7<sup>2-<sup> - orange
Fe 2+ green Fe 3+ yellow Co2+ in H2O pink Co2+ in acid blue-purple Cu2+ blue Cu2+ anhydrous white Ni2+ green
Precipitate Colors (a sampling)
silver chloride white silver sulfide black lead chloride white mercury chloride white lead chromate yellow mercury black aluminum hydroxide white iron (III) thiocyanate blood red copper(II) hydroxide thick light blue copper ammonia complex thick dark blue
Halogens
chlorine colorless bromine brown iodine pink
Gases:
Cl2 greenish yellow I2 purple NO2 colorless N2O4 brown