Question

The concentration of the solution is 20% & the mass of solution is 350grams find the mass

Answer 1

The concentration of a solution is the ratio of amount of solute in a solution to the amount  of the solvent.

The concentration can either be calculated using the mass of the solvent and the solute or by the volume of the solvent and the that the volume of the solute.

The following are the formulas used:

Concentration percentage by mass = mass of solute/mass of solution × 100

Concentration % by volume = volume of solute/ volume of solution × 100

Therefore to find the volume of solute from mass %:

You will multiply conc. of solution × mass of solution/100

mass of solute = 20% × 350 g/100%
                        = 70g

The mass of the solute therefore = 70g