Group 1 ions

(Li+, Na+, etc.) 

ammonium (NH4+) 

nitrate (NO3–) 

acetate (C2H3O2– or CH3COO–) 

hydrogen carbonate (HCO3–) 

halides (Cl–, Br–, I–) 

sulfates (SO42–) 

carbonate (CO32–) 

ions or ammonium (NH4+) 

chromate (CrO42–) 

phosphate (PO43–) 

INSOLUBLE

EXCEPT: when combined with Group 1 ions or ammonium (NH4+) 

sulfide (S2–) 

INSOLUBLE

EXCEPT: when combined with Group 1 ions or ammonium (NH4+)

hydroxide (OH–)