- special concentration unit in mol / L (abbbreviation M)
$$c={n \over v}$$
+$$c_1v_2=c_2v_2=n\quad\leftarrow(\operatorname{constant})$$
+
| Quantity | Symbol | Unit |
| ---------------------- | ------- | ------------- |
| molar mass | $M$ | g / mol |
## Precipitation reactions
Ions in solution combine to form a new compound.
+Occurs when concentration exceeds solubility.
Precipitation reactions happen when water cannot dissociate ionic lattice structure.
Precipitate (product):
+
- generally insoluble in water
- forms as solid particles that settle
- forms from compounds insoluble in water