2021 · Q100
A solution contains 20 g of solute in 180 g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage ?
General KnowledgeChemistry
- A11.1%
- B22.2%
- C10%
- D20%
Explanation
Mass percentage = (mass of solute ÷ total mass of solution) × 100 = (20 ÷ (20 + 180)) × 100 = 10%. 11.1% would result from dividing by the solvent mass alone, which is incorrect. The concentration is 10%.