These are just a few names of compounds, what color they
List of Gases:
are, their special characteristics (if any), etc.
--> I2 - violet
You'll find this information useful in Acids, Bases, and
Salts; Analytical Chemistry; and in the differentiate
--> Br2 - reddish/brownish gas
between two salt/acids/compounds questions.
--> NO2 - reddish brown gas
--> PbCl2 - white chalky ppt; insoluble in cold water, soluble
in hot water.
--> Cl2 - greenish yellow gas; NOTE: NOT yellowish green
--> AgCl - white curdy ppt; insoluble in hot and cold water
--> SO2 - burning sulphur smell
--> ZnO/PbO - yellow when hot, white when cold
--> NH3 - green flame when burnt in oxygen
--> BaSO4 - white ppt; insoluble in all dilute mineral acids
--> NH3, HCl, CO2, SO2 - colorless gas with pungent odor
--> PbSO4 - white ppt; insoluble on heating (or when hot)
--> HNO3(pure) - colorless
--> Zn(NO3)2 - white
--> HNO3(in sunlight) - yellow
--> CuSO4.5H2O - blue
List of Colored Ions:
--> CuSO4 (after losing water of crystallization) - white
--> Cupric Cu - Blue
2+
amorphous
3+
--> Chromium Cr
- Dark green
--> CuCO3 - green
2+
--> Nickel Ni - Green
--> Cu - reddish/pink deposit
2+
--> Ferrous Fe - Light green
--> CuO - black
3+
--> Ferric Fe - Brown
--> MnO2 - black
2+
--> Manganese Mn - Light pink
--> FeCl3 - reddish brown; NOTE: Name a reddish brown
2+
deliquescent salt (always FeCl3)
--> Cobalt Co - Pinkish violet
--> FeSO4 - dirty green
--> Permanganate MnO4 - Pink
--> KMNO4 - purple/violet
--> Chromate CrO4 - Yellow
--> K2Cr2O7- orange
--> Dichromate Cr2O7
-
2-
2-
- Orangish yellow
NOTE: All salts of Na, K, NH4 are white