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Difference (from prior author revision)
(major diff, minor diff)
Removed: 2d1
Changed: 4,5c3
Removed: 7d4
Removed: 9d5
Removed: 11d6
Removed: 13d7
Removed: 15d8
Removed: 21d13
Removed: 24d15
Removed: 26d16
Removed: 28d17
Removed: 30d18
Removed: 32d19
AP Solubility Table
These rules are used only in the Predicting Reaction Section of the AP Exam. We all know that there are no ionic solids that are completely "insoluble" in water.
Soluble in water
1.All nitrate compounds (NO31-) are soluble.
2.All acetates (C2H3O21-) are soluble except AgC2H3O2. Acetate can also be represented as CH3COO1-
3. All chlorates (ClO31-) are soluble.
4. All alkali metal cations (Group 1) and ammonia (NH41+) are soluble.
5. All bromides (Br1-), chlorides (Cl1-), and iodides (I1-) are soluble except:
- Silver cpds (AgCl, AgBr, and AgI)
- Pb2+(Lead II) cpds (PbCl2, PbBr2, and PbI2)
- Hg22+ (Mercury(I) cpds (Hg2Cl2, Hg2Br2, and Hg2I2)
- Hg2+ (Mercury(II) cpds (HgCl2, HgBr2, and HgI2)
6. All sulfates (SO42-) are soluble except BaSO4, PbSO4, Hg2SO4, CaSO4, SrSO4, and Ag2SO4
Insoluble in water
1. All carbonate (CO32-), phosphate (PO43-), and sulfite (SO32-) are insoluble except those of Group 1 elements and ammonia (NH41+).
2. All sulfide (S2-) are insoluble except Group 1 and Group 2 and ammonia (NH41+).
3. All chromate (CrO42-) are insoluble except those of Group 1 and ammonia (NH41+), CaCrO4, and SrCrO4.
4. All hydroxides are insoluble except those of Group 1, ammonia (NH41+), Ba(OH)2, Sr(OH)2 and Ca(OH)2.