Compound n mixture

2. Compound and Mixtures
PARAMETER COMPOUND MIXTURE
DEFINITION A chemical compound is a
pure chemical
substance consisting of two
or more different chemical
elementsthat can be
separated into simpler
substances by chemical
reactions.
A mixture is a material
system made up by two
or more different
substances which are
mixed but are not
combined chemically.
FeS Fe+ S

3. PARAMETER COMPOUND MIXTURE
NATURE Two or more elements unite
chemically
Two or more elements or
compounds are mixed such that
they do not combine chemically
Structure Always homogeneous : they
have the same composition
throughout.
Generally heterogeneous: their
composition is different at
different points.
Copper suphate
Salt + Sand

4. PARAMETER COMPOUND MIXTURES
Composition
Constituents are
present in a fixed
ratio by weight
Their constituents can be
present in any ratio: they
have variable
composition
Properties
Properties are
entirely different
from the properties
of constituents.
Constituents of a
mixture retain their
individual physical
and chemical
properties

5. Parameter Compound Mixture
Energy
changes
During its formation
energy is either
absorbed or released : a
chemical change takes
place
During its
formation no
energy changes
take place : a
physical change
takes place

6. Parameter Compound Mixture
Separation of
constituents
Cannot be separated by
physical means . But can
be separated by chemical
or electro-chemical
means.
Can be separated by
physical means