Solubility Solubility is the amount of solute that dissolves in 100 g of solvent to form a saturated solution at a given temperature. Ex. The maximum amount of sodium chloride that can be dissolved in 100 mL of water at 200C is 38 g. If you add more than 38 g of NaCl to 100 mL of water at 200C, it won’t all dissolve. Ex. 2 NaNO3 – 82 g will dissolve in 100 mL of water at 200C. So its solubility is 82 g/100 g of water. Comparing these 2 solids we see that we can dissolve more NaNO3 than NaCl so NaNO3 is said to be more soluble than NaCl.

SOLUBILITY The amount of solute per unit solvent required to form a saturated solution is called the solute's Solubility. When two liquids are completely soluble in each other they are said to be Miscible. Solubility is effected by Temperature. With increase in temperature solubility of most of the substances increases. Most gases become less soluble in water as the temperature increases.

SOLUBILITY GRAPH OF SALTS IN WATER CHEMISTRY RESOURCE 9C SOLUBILITY GRAPH OF SALTS IN WATER M.ALI. BLL, 2008

SOLUBILITY GRAPH OF GASES IN WATER Pressure has little effect on the solubility of liquids and solids. The solubility of gases is strongly influenced by pressure. Gases dissolve more at high pressure.