| This same sort of repetitive testing can be done with many concepts such as moles, molarity, molality, the periodic table, quantum numbers, and so forth. |
| Instead of dealing with the volume of the solution or solvent, molality is concerned with the mass of solution or solvent. |
| The number of molecules or ions in 1,000 grams of solvent usually is very large, so molality is defined as the number of moles per 1,000 grams of solvent. |
| The latter three properties are directly proportional to the molality of the dissolved solute, which is defined as the number of moles of solute per kilogram of solvent. |
| From Table 1 it is observed that density of aqueous solution varies linearly with molality. |
| It may be shown that the use of molality corrects for molecular volumes, but not for excluded volumes. |
