R-8 Solubility Guidelines

A substance is considered soluble if more than three grams of the substance dissolves in 100 ml of water. The more common rules are listed below. 

All common salts of the group 1 elements and ammonium ions are soluble. 

All binary compounds of group 17 elements (other than F) with metals are soluble except those of silver, mercury(l), and lead. 

All sulfates are soluble except those of barium, strontium, lead, calcium, silver, and mercury(l). 

Except for those in Rule 1, carbonates, hydroxides, oxides, sulfides, and phoshates are insoluble. 

---