Solubility Rules, Yo!

Anion Soluble Insoluble* Nitrates (NO3-), Acetates (CH3COO-) All common cations No common cations Chlorides (Cl-) Most common cations AgCl, HgCl2. PbCl2 is borderline. Bromides (Br-) Most common cations AgBr, HgBr2, PbBr2. Iodides (I-) Most common cations AgI, HgI2, PbI2. Sulfates (SO42-) Most common cations SrSO4, BaSO4, SnSO4, PbSO4, Ag2SO4. CaSO4 is borderline. Hydroxides (OH-) NaOH, KOH, LiOH, NH4OH, Sr(OH)2, Ba(OH)2. Ca(OH)2 is borderline. Most common cations Sulfides (S2-) Na2S, K2S, Li2S, (NH4)2S, MgS, CaS, BaS, SrS Most common cations Carbonates (CO32-) Na2CO3, K2CO3, Li2CO3, (NH4)2CO3 Most common cations Phosphates (PO42-) Na3PO4, K3PO4, Li3PO4, (NH4)3PO4 Most common cations Sulfites (SO32-) Na2SO3, K2SO3, Li2SO3 Most common cations