A 36.9 mL sample of solution contains 10.5 g MgBr2. If the solution is 17.7% MgBr2 by mass, what is the density of the solution (in g/mL)?

Answer 1

Density = mass/volume = grams/mls

Let us first find the mass of solution present, since we already know the volume (36.9 ml):

17.7 percent MgBr₂ means 17.7g MgBr₂ per 100 g of solution.

10.5 g MgBr₂ / x g solution = 17.7 g MgBr₂ / 100 g solution

x = 59.3 of solution

Density = mass/volume

Density = 59.3 g/36.9 ml = 1.61 g/ml