As has already been emphasized, a distinction between solvent and solute is merely conventional (p. 93).
Let n be the total number of molecules of the solute, and n″ the number of dissociated molecules.
Before solution the solute or dissolved substance may be solid, liquid, or gaseous.
As a rule a membrane is much more permeable to a solute whose molecule is of small dimensions.
A true solution is also a suspension of the molecules of the solute.
The liquid in which the substance dissolves is called the solvent, while the dissolved substance is called the solute.
Like the gaseous molecules, the molecules of a solute are mobile with respect to one another.
Osmotic pressure is in fact the gaseous pressure of the molecules of the solute.
(b) The weight of solute present in 100 grammes of the solution.
If the solute dissociates into ions, the reason for this becomes clear.
solute sol·ute (sŏl'yōōt, sō'lōōt)
A substance dissolved in another substance, usually the component of a solution present in the lesser amount.