Sol Definition in Chemistry

What Is a Sol?

A gel is a type of sol, which is in turn an example of a colloid.
A gel is a type of sol, which is in turn an example of a colloid. Image Source, Getty Images
by Anne Marie Helmenstine, Ph.D.
Updated December 07, 2017

Sol Definition

A sol is a type of colloid in which solid particles are suspended in a liquid. The particles in a sol are very small. The colloidal solution displays the Tyndall effect and is stable. Sols may be prepared via condensation or dispersion. Adding a dispersing agent may increase the stability of a sol. One important use of sols is in the preparation of sol-gels.

Sol Examples

Examples of sols include protoplasm, gel, starch in water, blood, paint, and pigmented ink.