This document defines solutions and the different types of solutions based on the amount of solute present: saturated, unsaturated, and supersaturated. It also discusses concentration of solutions and solubility. Physical changes are described as temporary alterations to a substance's physical properties that do not change its composition or mass, and are reversible. Chemical changes permanently transform substances into new products with different properties, and are irreversible. Examples of each type of change are provided.

1. Presented by : Neelu Sharma

2. Definition
 Solutions are the binary
mixture of two
components
1. solute
2. solvent.

3. Based on the amount of
solute.
Saturated
solution
Unsaturated
solution
Supersaturate
solution

5. Definition

7. Concentration of solution

8. solubility

13. Types of changes
Physical
change
Chemical
change

14. Physical Change
 A physical change is one in which some of the physical
properties ( colour, shape, state) of the substance
undergoing change are altered temporary.
 The actual composition and mass of the substances
remain unchanged and no new substances are
produced.
 The substance is restored to its original state after this
change.
 It is reversible in nature.

15. Examples of physical
changes
Evaporation of water
Dissolution of common salt in water
Mixing of iron filling and sulphur powder
Melting of ice.

16. CHEMICAL
CHANGE
 A chemical change is one in which
the substance undergoing change
are transformed into new substance
whose properties ( mass,
composition) are entirely different
from those of the original substance.
 The new substance cannot be
changed back to the original
substance.
 It is a permanent change.
 It is irreversible in nature.

17. Examples of
chemical change
 Burning of wood
 Ripening of fruits
 Digestion of food
 Rusting of iron
 Burning of coal
 Souring of milk
 Heating of iron and sulphur powder.

18. QUESTIONS
 Sugar solution is given to you in two separate test
tubes. In one test tube the solution is saturated, while
in other it is unsaturated. What test would you do to
identify them?
 Why physical change a temporary one?
 What do you expect to observe when a solution of
potassium nitrate saturated at 343K is cooled to room
temperature?

19. THANK YOU