# How can you increase the concentration of a solution?

$\text{Concentration}$ $=$ $\text{Moles of solute"/"Volume of solution}$, and thus it typically has the units $m o l \cdot {L}^{-} 1$. If we want to increase the concentration, we can either (i) reduce the volume of the solution by evaporating or stripping off the solvent (and this is rather hard for aqueous solutions); or (ii) add more solute to the solution to raise its concentration.