Question

What are the customary units of solubility on solubility curves?

Answer 1

Hint : Solubility is the measure of how much solute can dissolve in a given amount of solvent.
A solubility curve is a data based graph comparing the amount of solute that will dissolve in a given amount of solvent at various temperatures. The most typical solubility curves are graphed based solid and gaseous solutes dissolved in 100 grams of water.

Complete Step By Step Answer:

It is the solubility curve.
And from the definition of solubility, it is clear that unit of solubility is $\dfrac{{amount{\text{ }}of{\text{ }}solute{\text{ }}dissolved}}{{{\text{ }}given{\text{ }}amount{\text{ }}of{\text{ }}solvent}}$
Hence, the customary units of solubility on solubility curves is $\dfrac{{grams{\text{ }}of{\text{ }}solute{\text{ }}}}{{100g{\text{ }}of{\text{ }}water}}$ .

Additional Information:
Solubility can also be expressed as grams of solute per millilitres of solution or mass unit per any volume unit. It can also be expressed as moles of solute per litre of solution.
Hence, customary units of solubility on solubility curve can be taken as $\dfrac{{gram{\text{ }}of{\text{ }}solute{\text{ }}}}{{mL{\text{ }}of{\text{ }}solution}}$ .

Note :
$\dfrac{{gram{\text{ }}of{\text{ }}solute{\text{ }}}}{{mL{\text{ }}of{\text{ }}solution}} = \dfrac{{grams{\text{ }}of{\text{ }}solute{\text{ }}}}{{100g{\text{ }}of{\text{ }}water}}$ , so not to get confused between the two.
According to the graph, the solubility of any substance changes as temperature changes, that is, solubility can increase or decrease as temperature increases.