Purpose: Colloids are particles so small that they often appear to be dissolved in the water.
(Colloids; are; particles so small that they often appear to be dissolved in the water) (they; appear; T:often) (they; to be dissolved; L:in the water)
Colloids they they
are appear to be dissolved
particles so small that they often appear to be dissolved in the water
T:often
L:in the water