Q

A solution contains 48 g of common salt in 320 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

RRB Group D, 24-Oct-18 S-2 2018
✓ Answer: A 13.04%
To find the mass by mass percentage of the solution, use the formula: Mass percentage = (Mass of solute / Mass of solution) x 100. Mass of solute (salt) = 48 g; Mass of solvent (water) = 320 g; Mass of solution = Mass of solute + Mass of solvent = 368 g. Mass percentage = (48/368) x 100 ≈ 13.04%.
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