Answer to Question #273094 in General Chemistry for Fores

Question

An aqueous solution is prepared by dissolving 14.2 ml of methanol (ρ = 0.793 g/ml) in enough water to

produce 75.0 ml of solution. What is the concentration of this solution expressed as (a) % methanol by

volume and (b) % m/v?

Answer 1

1)To get the percentage by volume =

(14.2/75)×100=18.93%

2)To get the percentage of mass by volume.

To get the mass of the solute,

Mass=density × volume

Mass=0.793×14.2

Mass=11.26g

So percentage of mass by volume is

(11.26÷75)×100

=15%