Question

Question 3
To make a saturated solution, 36 gm of sodium chloride is dissolved in 100 gm of water at 293 K. Find its concentration at this temperature.

Answer 1

Be careful about calculating the mass of solution as we always have to take the sum of masses of solute and solvent to calculate the mass of solution.

Mass of sodium chloride (solute) = 36 gm
Mass of water (solvent) = 100 gm
Mass of solution = 36+100 = 136 gm
Concentration = $\left(\frac{Massofsolute}{Massofsolution}\right)\times 100$
Concentration = $\left(\frac{36}{136}\right)\times 100=26.47\%$