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.

Answer 1

Mass of solute (sodium chloride) = 36 g (Given)

Mass of solvent (water) = 100 g (Given)

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

                                 = (36 + 100) g

                                 = 136 g

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

${\displaystyle =\frac{\text{Mass of solute}}{\text{Mass of solvent}}\times 100\%}$

${\displaystyle =\frac{36}{136}\times 100\%}$

= 26.47%