Question

What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?

Answer 1

Given, Mass of urea = 16 gm
Mass of solution = 120 gm

$$\begin{gathered} \mathrm{concentration}=\frac{\mathrm{mass}\mathrm{of}\mathrm{solute}}{\mathrm{mass}\mathrm{of}\mathrm{solute}+\mathrm{mass}\mathrm{of}\mathrm{solvent}}\times 100 \\ =\frac{16}{120}\times 100 \\ =13.333\% \end{gathered}$$

Therefore, the concentration is 13.333%.