Question

A solution contains 50 g of common salt in 350 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

• A. 12.5%
• B. 11%
• C. 12%
• D. 12.11%

Answer 1

The correct option is A 12.5%

Given, mass of solute (common salt) = 50 g
Mass of solvent (water) = 350 g
Mass of solution = mass of solute + mass of solvent
= 50 + 350 = 400 g

Mass percentage of solution $=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$ $=\frac{50}{400}\times 100=12.5\%$.