Solubility

General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 1

Solubility


Solubility is the maximum amount of solute that dissolves in a

specific amount of solvent expressed as grams of solute in 100 grams of solvent

(usually water):

g of solute100 g water

Solubility


Unsaturated Solutions

Unsaturated solutions contain less than the

maximum amount of solute

can dissolve more solute

Dissolved solute


Saturated Solutions

Saturated solutions contain the maximum amount of

solute that can dissolve some undissolved solute

at the bottom of the container

Dissolvedsolute

Undissolvedsolute


At 40 C, the solubility of KBr is 80 g/100 g of H2O.Identify the following solutions as either (S) saturated

or (U) unsaturated. Explain.

A. 60 g KBr added to 100 g of water at 40 C.

B. 200 g KBr added to 200 g of water at 40 C.

C. 25 g KBr added to 50 g of water at 40 C.

Learning Check


A. U 60 g of KBr/100 g of water is less than the

solubility of 80 g of KBr/100 g of water.

B. S 200 g KBr added to 200 g of water at 40 C. This is the same as 100 g of KBr in 100 g of

water, which is more than the solubility of 80 g

of KBr/100 g of water at 40 C.

C. U 25 g KBr added to 50 g of water at 40 C. This is the same as 50 g of KBr in 100 g of water, which is less than the solubility of 80 g of KBr/100 g of water at 40 C.

Solution


Effect of Temperature on SolubilitySolubility depends on

temperature of most solids increases

as temperature increases

of gases decreases as temperature increases

Science

Solubility