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12
CH1012
ADDING ELECTROLYTE
Stable Colloid
Unstable Colloid
DG
DG
distance
distance
A positive
free energy DG
provides colloid stability.
provides colloid stability.
DGrep(electrostatic)
DGattr(van
der Waals)
DGtot (DGrep+ DGattr )
Adding
electrolyte reduces
the repulsive energy
between the particles.
the repulsive energy
between the particles.
The positive free energy is
removed from the curve &
the colloid is unstable.
removed from the curve &
the colloid is unstable.