Dissolvable Salt Rule

Question 1

Alkali Metals

Answer 1

All Alkali metals are water soluble

Question 2

NH₄⁺

Answer 2

All ammonium ion salts are water soluble

Question 3

Cl, Br, I

Answer 3

All Cl, Br, I salts soluble except with Ag⁺, Pb²⁺, Hg₂²⁺

Question 4

Metal Oxides

Answer 4

All Metal Oxides are insoluble

Except CaO, SrO and BaO which hydrolyze to form hetal Hydroxides

Question 5

Hydroxides

Answer 5

All are insoluble

Exception with Alkali metals and Ca²⁺, Sr²⁺, Ba²⁺

Question 6

Carbonates (CO₃^2-), Phosphates (PO₄^3-), Sulfides (S^2-), Sulfites (SO₃^2-)

Answer 6

All insoluble except with alkali metals and ammonium ions

Question 7

Sulfate Ion (SO₄^2-)

Answer 7

All are Soluble

Except with Ca²⁺, Sr²⁺, Ba²⁺, Pb²⁺