Which expression describes solubility as milliliters of solvent required to dissolve 1 gram of solute?

Which expression describes solubility as milliliters of solvent required to dissolve 1 gram of solute?

• A. g of solute soluble in 1 mL of solvent
• B. g of solute soluble in 100 mL of solvent
• C. mL of solvent required to dissolve 1 g of solute
• D. mL of solvent required to dissolve 100 g of solute

Answer: (C)

Solubility is how much solute can dissolve in a solvent at a given temperature, and it can be expressed in two common ways: either as the amount of solute per a fixed amount of solvent (for example, grams of solute in 100 mL of solvent) or as a reciprocal form, the amount of solvent required per unit of solute (milliliters of solvent per gram of solute). The expression described here—milliliters of solvent required to dissolve 1 gram of solute—fits the second form, giving solubility in units of mL per g. This is useful when you think about how much solvent you need to dissolve a specific amount of solute. For example, if 5 mL of solvent dissolves 1 g of solute, the solubility is 5 mL/g. The other expressions correspond to different ways of stating solubility, such as grams per milliliter, grams per 100 milliliters, or milliliters per 100 grams, which is why they don’t match the described form.

Solubility is how much solute can dissolve in a solvent at a given temperature, and it can be expressed in two common ways: either as the amount of solute per a fixed amount of solvent (for example, grams of solute in 100 mL of solvent) or as a reciprocal form, the amount of solvent required per unit of solute (milliliters of solvent per gram of solute). The expression described here—milliliters of solvent required to dissolve 1 gram of solute—fits the second form, giving solubility in units of mL per g. This is useful when you think about how much solvent you need to dissolve a specific amount of solute. For example, if 5 mL of solvent dissolves 1 g of solute, the solubility is 5 mL/g. The other expressions correspond to different ways of stating solubility, such as grams per milliliter, grams per 100 milliliters, or milliliters per 100 grams, which is why they don’t match the described form.