Colloidal systems can be classified based on the state of the dispersed phase and the dispersion medium. Common types include: - Sol: Solid particles dispersed in a liquid (e.g., paint). - Gel: A network of solid particles in a liquid (e.g., gelatin). - Emulsion: Liquid droplets dispersed in another liquid (e.g., milk). - Foam: Gas bubbles dispersed in a liquid (e.g., shaving cream).
