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General Chemistry, 5th ed.
Whitten, Davis & Peck
Solubility Rules
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Na+
Generally soluble
No common exceptions
K+
Generally soluble
No common exceptions
NH4+
Generally soluble
No common exceptions
Chlorides (Cl-)
Generally soluble
AgCl
Insoluble
Hg2Cl2
Insoluble
PbCl2
Soluble in HOT water
Bromides (Br-)
Generally soluble
AgBr
Insoluble
Hg2Br2
Insoluble
PbBr2
Insoluble
HgBr2
Moderately soluble
Iodides (I-)
Generally soluble
Many heavy metal iodides
Insoluble
Sulfates (SO4-2)
Generally soluble
BaSO4
Insoluble
PbSO4
Insoluble
HgSO4
Insoluble
CaSO4
Moderately soluble
SrSO4
Moderately soluble
Ag2SO4
Moderately soluble
Nitrates (NO3-1)
Generally soluble
Nitrites (NO2-1)
Generally soluble
AgNO2
Moderately soluble
Chlorates (ClO3-1)
Generally soluble
(ClO4-1)
Generally soluble
KClO4
Moderately soluble
(MnO4-1)
Generally soluble
Acetates (CH3COO-1)
Generally soluble
AgCH3COO
Moderately soluble
Sulfides (S-2)
Generally insoluble
(NH4)2S
Soluble
Na2S
Soluble
K2S
Soluble
MgS
Soluble
CaS
Soluble
Oxides (O-2)
Generally insoluble
Li2O
Soluble
Na2O
Soluble
Na2O
Soluble
NaOH
Soluble
K2O
Soluble
BaO
Soluble
CaO
Moderately soluble
SrO
Moderately soluble
Hydroxides (OH-1)
Generally insoluble
LiOH
Soluble
KOH
Soluble
Ba(OH)2
Soluble
Ca(OH)2
Moderately soluble
Sr(OH)2
Moderately soluble
Carbonates (CO3-2)
Generally insoluble
(NH4)2CO3
Soluble
Na2CO3
Soluble
K2CO3
Soluble
Phosphates (PO4-3)
Generally insoluble
(NH4)3PO4
Soluble
Na3PO4
Soluble
K3PO4
Soluble
Arsenates (AsO4-3)
Generally insoluble
(NH4)3AsO4
Soluble
Na3AsO4
Soluble
K3AsO4
Soluble