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30 terms

AP CHEM. Colors in Aqueous Solution

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Orange
Dichromate (Cr2O7)2-
Violet
Permanganate (MnO4)-
Luminol
a chemical that is capable of presumptively detecting bloodstains diluted up to 10,000 times and is used to identify blood that has been removed from a given area
Lavender Blue
Nickel-Aluminum Complex Ni{(NH3)6}2+
Phenolphthalein
the indicator that turns colorless in acids, and pink or red in bases
Yellow
Cobalt-Aluminum Complex Co{(NH3)6}3+
Blue
Titanium 3+ (Ti) 3+
Colorless
Scandium 3+ (Sc)3+
Colorless
Chromate (CrO4) 2-
May also be yellow, but it is this color the majority of the time.
Colorless
Manganese 2+
Light Blue
Iron 2+ (Fe)2+
Yellow/Brown
Iron 3+ (Fe)3+
Light Red
Cobalt 2+ (Co)2+
Blue
Copper 2+ (Cu)2+
Light Green
Nickel 2+ (Ni)2+
Colorless
Silver (Ag)+
Very light blue
Zinc 2+ (Zn) 2+
Blue/Purplish
Chromium 3+ (Cr)3+
Dark Grey/GreenVanadium 3+
Vanadium 3+ (V)3+
Ligand
A molecule that binds specifically to another molecule, usually a larger one.
Lavender
Vanadium 2+
Yellow Green
Tetrachloro-copper complex Cu(Cl4)2-
Conjugation System
System with connected p-orbitals with delocalized electrons in compounds with alternating single and multiple bonds, which in general may lower the overall energy of the molecule and increase stability. Excessive amounts of this are the reasons that a lot of organic compounds are colored.
Blue
Vanadium Oxide (VO)2+ Oxidation State of 4.
Yellow
Vanadium peroxide (VO)subscript 2 , Oxidation State of 5 is most common.
Purple
Ti(H20)6 3+
Violet
[Co(NH3)5Cl]Cl2
Yellow
[Cr(NH3)6]Cl3
Purple
[Cr(NH3)5]Cl2
Pink
CoCl2

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