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

Given,
Mass of solute (NaCl) \( = 36 g \)

Mass of solvent (H₂O) \( = 100 g \)

Now, Mass of solution (NaCl + H₂O) \( = 136 g \)

We know that, \( Concentration = \) \( Mass \ of \ solute \over Mass \ of \ solution \) \( × 100 \)

=> \( Concentration = \) \( 36 \over 136 \) \( × 100 = 26.47% \)

Hence, the concentration of the solution is 26.47%