6.1.1 Solubility Solubility is the maximum amount of solute that will dissolve in a given quantity of solvent when dynamic equilibrium is established between undissolved solute and the solution at a specific temperature.We usually use the symbol "Sto express it. Solubility usually is expressed in grams of solute per 100g of water(g/100g)for aqueous solution.Solubility is the maximum amount of solute that will dissolve in a given quantity of solvent when dynamic equilibrium is established between undissolved solute and the solution at a specific temperature. We usually use the symbol “ S” to express it. Solubility usually is expressed in grams of solute per 100g of water (g /100g) for aqueous solution. 6.1.1 Solubility