Soluble and Insoluble

ALWAYS Soluble

(no exceptions)

Group 1 Cations: Na⁺, K⁺, Li⁺…

Nitrate: NO₃^-

Acetate: C₂H₃O₂

Ammonium: NH₄⁺

Bicarbonate: HCO₃^-

Chlorate: ClO₃^-

Soluble

(with exceptions)

Florine: F^-

Chlorine, Bromine, Iodine: Cl^-, Br^-, I^-

Sulfate: SO₄^2-

Exceptions that make F- Insoluble

Group 2 Cations: Be²⁺, Mg²⁺, Ca²⁺…

Lead (ii): Pb²⁺

Iron (iii): Fe³⁺

Exceptions that make Cl^-, Br^-, I^- Insoluble

Silver: Ag⁺

Mercury (ii): Hg₂²⁺

Lead (ii): Pb²⁺

Exceptions that make SO₄^2- Insoluble

Silver: Ag⁺

Calcium: Ca²⁺

Barium: Ba²⁺

Strontium: Sr²⁺

Mercury (ii): Hg₂²⁺

Lead (ii): Pb²⁺

Insoluble

Carbonate: CO₃^2-

Chromate: CrO₄^-

Phosphate: PO₄^3-

Sulfur: S^2-

Hydroxide: OH^-

Exceptions that make CO₃2-, CrO₄^-, PO₄^3-, S^2- Soluble

Group 1 Cations: Na⁺, K⁺, Li⁺…

Ammonium: NH₄⁺

Exceptions that make OH^- Soluble

Group 1 Cations: Na⁺, K⁺, Li⁺…

Barium: Ba²⁺