Changes in matter

2. Acid and alkali
Properties
Physical change
Chemical change

3. Physical and
Chemical Change

5. involves changes to the physical
properties of a substance without any
new substances being formed.
Physical change

7. Chemical change
Produces one or more new
substances, which have different
physical and chemical properties from
the original substance.
Reactant- the original substance
Product- new substance formed

9. Physical
change
Condition Chemical
change
No Is there any new
substance formed?
Yes
Yes Is the change
reversible?
No (not always)
Yes, changes in
the physical
properties
Are there any changes
in the properties of the
original substance?
Yes, changes in
both chemical and
physical properties

10. Chemical Equation
• Chemical equations are used to
describe chemical reactions.
• They tell us about the reactants that are
involved, as well as the products that
are formed at the end of the reaction.

11. Carbon dioxide + Glucose + Oxygen
Light
Chlorophyll
Reactants Carbon dioxide and
water
Products Glucose and oxygen
Conditions Light and chlorophyll

12. Homework:
Bring 3 tablets of ANTACID ( antacil, etc.)
Salt water ( if possible)
Salt