Accumulation of molecular particles
of at the surface rather than in the
bulk of a solid or liquid is known as Ad-
sorption.
It is a surface phenomenon.
alloysSolid solSolidSolid
Ink
Sol
LiquidSolid
Dust
Solid
aerosol
GasSolid
ButterGelSolidLiquid
MilkEmulsionLiquidLiquid
Fog
Liquid
aerosol
GasLiquid
Pumice stoneSolid solSolidGas
Shaving
Cream
Foam
LiquidGas
Type of
Colloid
Dispersion
Medium
Dispersed
Phase Example
• It is reversible.
• Simply on surface of adsorbent
by weak van der waal's forces.
• Low temperature and high
pressure are favourable
CHEMISORPTION
Heterogeneous mixture
where one substance is
dispersed in another
substance called
dispersion medium
• Multimolecular colloids
large no. of atoms/
molecules aggreate (size <
1 nm)
• Macromolecular colloids:
large molecules (Polymers)
• Associated: Low
concentration colloids like
normal electrolytes
Lyophilic Colloids:
Solvent loving
Lyophobic colloids:
solvent hating
Colloids Based on Physical
state
Classification
PURIFICATION
COLLIGATIVE
PROPERTIES
Dialysis
Electrodialyris
ultra filteration
Tyndall effect
Brownian Moment
DISPERSION METHOD
Mechanical
Bredig's arc
Peptization
Exchange of solvent
CHEMICAL METHOD
Oxidation
Reduction
Hydrolysis
Double decomosition
method
Disperesed
phase
Disperesed
medium
METHODS OF PREPARATION
FRENDLICH ADSORPTION
THEOREM
Adsorption isotherm means to
express variation in the amount
absorption with pressure at
constant temperature
Dispersion of one liquid
into another liquid which
is immersible
Water
Oil
Oil dispersed in
water
(O/w type) Milk
Water dispersed
in oil (W/O type)
Butter
Types
Heterogeneous:
Reactant and Catalyst in different
physical state:
Homogeneous:
Catalyst and Reactant in same
physical state:
NO(g)
2SO (g) O (g) 2SO (g)
+ →
223
pt
2SO (g) 2SO (g)
→
Substance which alter the rate
of reaction and remain
chemically and quantitatively
unchanged after the reaction
are known as catalyrt and
phenomenon is known as
catalyris.
Purification of drinking
water.
Medicines
Rubber Industry
Industrial production
APPLICATION
Enzyme that catalyse
many life process in living
organism are termed as
Biochemical catalysts
knows as Biochemical
catalysis.
Step 2: Decomposition
of activated complex
to form product
ES* → E + p
Step 1: Binding of
enzyme to substrate
to form an activated
complex
E + S → E S*
Lock and key
theory
Induced Fit
theory
Catalytic reaction
that depends upon
pore structure of
catalyst and size of
reactant and product
moelcule (Zeolites)
Enzyme
catalysis
Shape
selective
Mechanism Mechanism
•
•
Types of catalysis
Thermodynamics of
Isotherm
SURFACE CHEMISTRY
Micelles
CONDENSATION METHOD
• Irreversible process
• simply on surface of
absorbent via chemical
bonds.
• High temperature and
high pressure is
favourable.
PHYSISSORPTION
log log K log p
m n
= +
x
x
1
mK.p ( n>1 )=
1
n
Bond on nature
of interaction
23
DR. Anand Mani
anand_mani16 https://www.anandmani.com/ https://discord.io/anandmani t.me/anandmani001
