Surface Chemistry
6.0 Types of Solutions
6.0 Types of Solutions
Depending on the size of the dispersed phase in dispersion medium, solutions are divided into three classes.
- True solutions (Molecular solutions)
- Colloidal solution (Colloidal dispersion)
- Suspension (Coarse dispersion)
| Properties | True Solutions | Colloidal Solutions | Suspensions |
| Size | Less than $1$ $nm$ | Between $1$ $nm$ and $100$ $nm$ | Greater than $100$ $nm$ |
| Visibility | Invisible even under ultra-microscope | Visible only under ultra-microscope | Visible even by naked eye |
| Diffusion | Diffuse readily through parchment membrane | Diffuse slowly through parchment membrane | No diffusion |
| Filtration | Possible through filter paper and parchment membrane | Possible through filter paper but not through parchment membrane | Impossible through filter paper and parchment membrane |
| Scattering of light | No scattering | Scattering take place (Tyndall effect) | Do not show Tyndall effect |
