Question

To make a saturated solution, $136g$ of a salt is dissolved in $500g$ of water at 293 K. Find its solubility at this temperature.

Answer 1

Mass of solute (sodium chloride) = $136g$ (Given)

Mass of solvent (water) = $500g$ (Given)

Then, mass of solution = Mass of solute + Mass of solvent

= $(136+500)$ g

= $636g$

Therefor solubility = $\frac{massofsolute}{massofsolvent}$$\times$ $100$
= $\frac{136}{500}$$\times$ $100$
= $27.2$

Therefore, concentration (mass by mass percentage) of the solution

= $\frac{massofsolute}{massofsolution}$$\times$ $100$
= $\frac{136}{636}$$\times$ $100$

= $21.38$ %