Is the nature of solute important when preparing a solution of a specified concentration?
The polarity of the solute dictates its solubility in various solvents.
Example: Sodium chloride (NaCl) or table salt is extremely polar and should be soluble in polar solvents such as water. In fact table salt is very soluble in water. It is insoluble in non-polar solvents such as benzene or toluene.