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JAMB Chemistry 2021 Paper

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Question : 28

Total: 40

A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage

11.%
22.2%
10%
20%

Solution:

Mass of Solution = Mass of Solute + Mass of Solvent → 20g + 180g

: Mass of Solution = 200g

Mass Percent = $\frac{\text{Mass of Solute}}{\text{Mass of Solution}} \times 100\%$

Mass percent = $\frac{20}{200} \times 100\%$

Mass percent = 10%

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