6 Solubility Rules

• Rule 6

  Hydroxides and oxides are insoluble EXCEPT for lithium, calcium, rubidium, strontium, sodium, barium, potassium, and cesium.
• Rule 5

  Except for rule 1, carbonates, phosphates, chromates, sulfides, and sulfates are insoluble.
• Rule 4

  All sulfates are soluble, EXCEPT those of silver, mercury, barium, strontium, calcium, and lead.
• Rule 3

  The halogen trio (bromide, chloride and iodide) with metals are soluble, EXCEPT those of Ag (Silver), Hg (Mercury), and Pb (Lead).
• Rule 2

  All nitrates, acetates, chlorates, and perchlorates are soluble. (The 4 good ates)
• Rule 1

  All common compounds of Group I and ammonium ions are soluble.