A student prepared a solution by dissolving 20 g of common salt in 180 g of water. Calculate the mass by mass percentage of the solution.
BiologyClass 9CBSEAnswered 12 May 2026
Answer
Given:
Mass of solute (common salt) = 20 g
Mass of solvent (water) = 180 g
Mass of solution = Mass of solute + Mass of solvent
Mass of solution = 20 g + 180 g = 200 g
Mass by mass percentage of solution = (Mass of solute / Mass of solution) × 100
Mass by mass percentage = (20 g / 200 g) × 100
Mass by mass percentage = (1/10) × 100 = 10%
Therefore, the mass by mass percentage of the solution is 10%.
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