Question

0.5 g of a substance is dissolved in 25 g of a solvent. Calculate the concentration of solution in terms of mass by mass percentage.

• A. 1.96%
• B. 4.85%
• C. 3.1%
• D. 2.8%

Answer 1

The correct option is A 1.96%

Mass of substance = 0.5 g.
Mass of the solvent = 25 g.

Mass of solution = Mass of solute + Mass of solvent = 0.5 g + 25 g = 25.5 g

Mass by mass percentage = (Mass of solute/Mass of solution) x 100

Mass by mass percentage = (0.5 g/25.5 g) x 100
= 1.96%

So, the concentration of solution in terms of mass by mass percentage is 1.96%.