Chem 111 Solubility Rules

Rule 1

All Sodium (Na⁺), potassium (K⁺) and ammonium (NH⁴) salts are SOLUBLE

Rule 2

All nitrate (NO₃^-), acetate (CH₃CO2^-) and perchlorate (ClO₄^-) salts are SOLUBLE

Rule 3

All Chloride (Cl^-), bromide (Br^-), and iodide (I^-) salts are SOLUBLE - EXCEPT those also containing: lead, silver, or mercury (I), (Pb²⁺, Ag⁺, Hg₂²⁺), which are NOT soluble

Rule 4

All sulfate (SO₄^2-) salts are SOLUBLE - EXCEPT those also containing: calcium, silver, mercury (I), strontium, barium or lead (Ca²⁺, Ag⁺, Hg₂²⁺, Sr²⁺, Ba²⁺, Pb²⁺), which are NOT soluble

Rule 5

Hydroxide (OH^-) and oxide (O^2-) compounds are NOT SOLUBLE - EXCEPT those also containing: sodium, potassium or barium (Na⁺, K⁺, Ba²⁺), which are SOLUBLE

Rule 6

Sulfide (S^2-) salts are NOT SOLUBLE - EXCEPT those also containing: sodium, potassium, ammonium, or barium (Na⁺, K⁺, NH₄⁺, Ba²⁺), which are SOLUBLE

Rule 7

Carbonate (CO₃^2-) and phosphate (PO₄^3-) salts are NOT SOLUBLE - EXCEPT those also containing: sodium, potassium or ammonium (Na⁺, K⁺, NH₄⁺), which are SOLUBLE