To make a saturated solution, 56g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
According to Class 9th Science chapter 2 notes, we solve the numerical as follows,
Mass of solute (NaCl) = 56 g
Mass of solvent (H2O) = 100 g
Mass of solution (NaCl + H2O) = 156 g
Concentration = Mass of solute/Mass of solution x 100
Concentration = 56/156 x 100 = 35.89%
Hence, the concentration of the solution is 35.89%
These topics can also be downloaded from Is Matter around us pure? class 9 notes pdf download or Class 9 Science chapter 2 notes pdf download.