Soluble insoluble

$$CO_3^{2-}$$

Carbonate salts are insoluble (solid)

$$CrO_4^{2-}$$

Chromate salts are insoluble (solid)

$$O^{2-}$$

Oxide salts are insoluble (solid)

$$OH^-$$

Hydroxide salts are insoluble (solid)

$$PO_4^{3-}$$

Phosphate salts are insoluble (solid)

$$S^{2-}$$

Sulfide salts are insoluble (solid)

$$ClO_3^-$$

Chlorate salts are soluble (aqueous)

$$CH_3COO^-$$

Acetate salts are soluble (aqueous)

$$SO_4^{2-}$$

Sulfate salts are soluble (aqueous)

$$Cl^-, Br^-, I^-$$

Chloride, Bromide, and Iodide salts are soluble (aqueous)

$$NO_3^-$$

Nitrate salts are soluble (aqueous)

Group 1A Metals ($Li^+, Na^+, K^+, Rb^+, Cs^+$)

Salts containing Group 1A Metals (Lithium, Sodium, Potassium, Rubidium, Cesium) are soluble (aqueous)