Question

A solution contains 40 grams of common salt dissolved in 345 grams the solution. Calculate the concentration percentage of the solution by mass percentage.

Answer 1

Mass (solute) = 40 grams

Mass ( solvent ) = 345 grams

Mass( solution) = Mass(solute) + Mass(solvent)

= 40 grams + 345 grams

= 385 grams

Therefore Mass % (solution) = [Mass(solute) / Mass(solvent)] $\times 100$

= $\frac{40}{385}$ $\times 100$

=11. 59%