This document discusses solubility and the different types of solutions. It defines solubility as the maximum amount of solute that can dissolve in a given amount of solvent under certain conditions. There are three types of solutions based on solubility: unsaturated, saturated, and super saturated. For saturated solutions, dissolution continues until dynamic equilibrium is established between dissolved and undissolved solute. Temperature and pressure are two factors that affect solubility. For gases dissolved in liquids, solubility decreases with increasing temperature but increases with increasing pressure.

1. Solutions &
Colloids
Chapter # 10
Chemistry XI FDC
Ms. Sidra Javed

2. Solubility
The maximum
amount of solute
that dissolves in the
given quantity of a
solvent under given
conditions is called
solubility.

3. Types of Solution on
the basis of
Solubility
1. Unsaturated
solution
2. Saturated
Solution
3. Super Saturated
Solution

5. Dynamic Equilibrium
established at
saturation
In saturated solution,
dissolution is
continued.
Un-dissolved solute
(solid)= Dissolved
solute(aqueous)

6. FACTORS EFFECTING
SOLUBILITY
1. Temperature
2. Pressure

7. Effect of temperature
The solubility of solutes is very
temperature dependent.
For gases dissolved in liquids, as
temperature increases, solubility
decreases.
On the other hand, for most solids
dissolved in liquids, solubility
increases as temperature increases.

8. Heat of solutions

9. Effect of pressure
Only observed in
gaseous solutions
Solubility of gas
increase as pressure
increases

10. Effect of pressure
Henry’s Law states
that the solubility of
a gas in a liquid is
directly proportional
to the partial
pressure of the gas
in direct contact
with the liquid.

11. End of Lesson