To make a saturated solution,
Question.
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.

Solution:

Concentration $=\frac{\text { Mass of solute }}{\text { Mass of solution }} \times 100$

Here, mass of solute = 36 g

and mass of solvent = 100 g

Therefore, Mass of solution $=100+36=136 \mathrm{~g}$

Thus, concentration $=\frac{36}{136} \times 100=26.47 \%$
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