Question

What is the concentration in terms of mass percent of a solution in which 40 g of salt is dissolved in 200 mL of water?

• A. 12.5 %
• B. 16.66 %
• C. 20 %
• D. 25.0 %

Answer 1

The correct option is B

16.66 %

1 mL of water has a mass of 1 g. So, mass of 200 mL of water = 200g

Mass of the solution = mass of the solute + mass of the solvent = 200 + 40 = 240 g

Mass percentage of a solution = $\frac{massofthesolute}{massofthesolution}\times 100\%=\frac{40g}{240}\times 100\%=16.66\%$