Color My World….

Flame Tests:
Li+ deep red (crimson)
Na+ yellow
K+ violet
Ca++ orange
Sr++ red
Ba++ green
Cu++ blue-green


Some typical solution colors:
MnO₄- = purple solution
CrO₄^-2 = yellow
Cr₂O₇^-2 = orange

Cu+ or ++ green to blue depending on charge
Fe++ or +++ yellow to red-orange (rare complex ions form deep-blue color)
Co++ pink
Cr green
Ni++ green



AgCl ppt. white
PbI₂ bright yellow ppt.
NO₂ brown gas, associated with rxns with  nitric acid and metals
Cu(NH₃) ₄⁺² dark blue


Many Na and K solid salts are white...