Question

If solid material settles out of a mixture over time, the unknown mixture is likely a __________. solution homogenous colloid suspension

Answer 1

The unknown mixture would be a colloid.

Answer 2

The correct answer is colloid.

Suspensions already show a distinct phase separation. In colloids phase separation is very slow. Sometimes phase separation may never occur in a colloid. The colloid particles are invisible to the naked eye and pass through filter paper. They are visible with light microscope and do not undergo sedimentation.