Question: what is the important difference between how concentration and solubility are measured?
Answer: Remember the distinction between concentration and solubility. Concentration is measured in grams of solute per 100 mL of solution (g/100 mL solution), but solubility is measured in grams of solute per 100 mL of solvent (g/100 mL solvent). Different solutes have different solubilities, as Table 1 shows.