AP Chem Test – Solubility Rules

Flashcard maker : Lily Taylor
Alkali Metals:
Li+,Na+,K+,Rb+,Cs+
All salts of ALKALI METALS are SOLUBLE.
Ammonium:
NH4+
All salts of AMMONIUM are SOLUBLE.
Nitrate:
NO3-
All salts of NITRATE are SOLUBLE.
Chlorate:
ClO3-
All salts of CHLORATE are SOLUBLE.
Perchlorate:
ClO4-
All salts of PERCHLORATE are SOLUBLE.
Acetate:
C2H3O2-
All salts of ACETATE are SOLUBLE.
Chloride, Bromide, and Iodide:
Cl-, Br-, I- (Middle Halogens)
All salts of CHLORIDE, BROMIDE, and IODIDE are SOLUBLE EXCEPT those containing:
SILVER, LEAD AND MERCURY
Ag+, Pb2+, and (Hg2)2+
Sulfate:
(SO4)2-
All salts of SULFATE are SOLUBLE EXCEPT those containing:
SILVER, LEAD, MERCURY AND HEAVY GROUP 2A IONS
Ag+, Pb2+, (Hg2)2+, Ca2+, Sr2+, and Ba2+
Hydroxide:
OH-
All salts of HYDROXIDE are INSOLUBLE except those containing ALKALI METALS and HEAVY GROUP 2A IONS (Ca2+, Sr2+, and Ba2+)
Carbonate:
(CO3)2-
All salts of CARBONATE are INSOLUBLE except those containing ALKALI METALS and AMMONIUM (NH4+).
Phosphate:
(PO4)3-
All salts of PHOSPHATE are INSOLUBLE EXCEPT those containing ALKALI METALS and AMMONIUM (NH4+).
Sulfite:
(SO3)2-
All salts of SULFITE are INSOLUBLE except for those containing ALKALI METALS and AMMONIUM (NH4+)
Chromate:
(CrO4)2-
All salts of CHROMATE are INSOLUBLE EXCEPT those containing ALKALI METALS and AMMONIUM (NH4+).
Sulfide:
S2-
All salts of SULFIDE are INSOLUBLE EXCEPT those containing ALKALI METALS, AMMONIUM (NH4+), AND ALL GROUP 2A IONS.

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