Question

A solution contains 40 g of common salt in 320 g of water. What is the concentration in terms of mass by the mass percentage of the solution?

• A. 10.05 %
• B. 11.05%
• C. 11.11 %
• D. 11.15%

Answer 1

The correct option is C

11.11 %

Explanation for correct option (c):

The concentration in terms of mass by the mass percentage of the solution is calculated by:$\frac{Massofsolute}{Massofsolution}\times 100$

Given:

• Mass of common salt (solute) = 40 g
• Mass of water (solvent) = 320 g
• Total mass of solution = 320 g + 40 g = 360 g.
• The concentration of solution =$\frac{40}{360}\times 100$$=11.11\%$
• Hence the correct answer is option c.