Colloids Flashcards
Colloids are divided into
Lyophobic and lyophillic
Examples of lyophilic sol.
Egg albumin
Starch
Gum
Oxides and hydrated oxides.
Which sol is reversible
Lyophilic
Which ones are the liquid hating sols
Lyophobic
Can lyophobic sols be mixed
No
Examples of lyophobic sols
Fe(OH) 3 , Al(OH) 3, Ar2S3
Which are the irreversible sols
Lyophobic
A colloidal system is divided into 2___ and ____. And they represent ____ and ____ in regular solution.
Dispersion phase and dispersion medium
Solute and solvent
Size of colloidal particles
1 to 1000 nm
What are the factors for stability of a sol?
Charge and solvation
Relationship of lyophobic sols and charge of a sol
Depends on the charge as it prevents coagulation therefore the sol remains in medium
Examples of -ve sols
Starch
Ar2S3
Hydrated ferric oxide
Examples of +ve sol
FeCl3 + excess of hot water
Lyophilic is stabilized due to
Solvation
