COLLOIDS

1. IS MATTER
AROUND US PURE
( COLLOIDAL
SOLUTIONS)
BY: MISS RITIMA
( YOU TUBE CHANNEL : SHORT SHOT BIOLOGY
 FOLLOW @ SLIDE SHARE APP- MISS RITIMABIOLOGYEXP)

2. WHAT IS A COLLOIDAL SOLUTIONS?
A COLLOIDAL SOLUTION IS A HETEROGENEOUS
MIXTURE.
BUT DUE TO SMALL PARTICLE SIZE THE
COLLOIDAL SOLUTION APPEAR TO BE THE
HOMOGENEOUS MIXTURES.
EXAMPLES: MILK
WE CAN NOT SEE COLLOIDAL PARTICLES WITH
OUR NAKED EYES .
THEY SHOW TYNDALL EFFECT.

3. EXAMPLES OF COLLOIDS

4. COLLOIDAL PARTICLES SHOW TYNDAL
EFFECT

5. PROPERTIES OF COLLOID
COLLOID IS A HETROGENEOUS MIXTURE.
THE PARTICLES OF COLLOIDS CAN NOT BE
SEEN BY NAKED EYES.
THEY DONOT SETTLE DOWN WHEN LEFT
UNDISTURBED , THAT IS THE COLLOIDS ARE
QUITE STABLE.
THEY CAN NOT BE SEPARATED FROM IXTURE
BY THE PROCESS OF FILTRATION.
THE CENTRIFUGATION TECHNIQUE IS USED
TO SEPARATE THE COLLOIDAL PARTICLES.

6. COMPONENTS OF COLLOIDAL
SOLUTION
a. DISPERSED PHASE
b. DISPERSION MEDIUM
DISPERSED PHASE
THE SOLUTE LIKE COMPONENT OF THE
COLLOIDAL SOLUTION FORM DISPERSED
PHASE.
DISPERSION MEDIUM
THE MEDIUM IN WHICH DISPERSED PHASE IS
SUSPENDED IS CALLED DISPERSION
MEDIUM

8. SNO. DISPERSED
PHASE
DISPERSING
MEDIUM
TYPE EXAMPLE
1 LIQUID GAS AEROSOL FOG , CLOUDS,
MIST
2 SOLID GAS AEROSOLS SMOKE,
AUTOMOBILE,
EXHAUST
3 GAS LIQUID FOAM SHAVING CREAM
4 LIQUID LIQUID EMULSIONS MILK , FACE
CREAM
5 SOLID LIQUID SOL MILK OF
MAGNESIA
6 GAS SOLID FOAM FOAM , RUBBER,
SPONGE.
7 LIQUID SOLID GEL JELLY , CHEESE ,
BUTTER
8. SOLID SOLID SOLID GEL COLOURED GEM
STONE, MILKY
GLASS