Question:
A solution is \(0.25%\) by mass. What is the weight of solvent containing \(1.25~\text{g}\) solute?
A solution is \(0.25%\) by mass. What is the weight of solvent containing \(1.25~\text{g}\) solute?
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Mass of solution = mass of solute + mass of solvent.
Updated On: Jan 26, 2026
- \(498.75~\text{g}\)
- \(300~\text{g}\)
- \(600~\text{g}\)
- \(200~\text{g}\)
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The Correct Option is A
Solution and Explanation
Step 1: Use definition of mass percentage.
\[ %\text{ by mass} = \frac{\text{Mass of solute}}{\text{Mass of solution}} \times 100 \] Step 2: Substitute given values.
\[ 0.25 = \frac{1.25}{\text{Mass of solution}} \times 100 \] Step 3: Calculate mass of solution.
\[ \text{Mass of solution} = \frac{1.25 \times 100}{0.25} = 500~\text{g} \] Step 4: Calculate mass of solvent.
\[ \text{Mass of solvent} = 500 - 1.25 = 498.75~\text{g} \] Step 5: Conclusion.
Hence, the weight of solvent is \(498.75~\text{g}\).
\[ %\text{ by mass} = \frac{\text{Mass of solute}}{\text{Mass of solution}} \times 100 \] Step 2: Substitute given values.
\[ 0.25 = \frac{1.25}{\text{Mass of solution}} \times 100 \] Step 3: Calculate mass of solution.
\[ \text{Mass of solution} = \frac{1.25 \times 100}{0.25} = 500~\text{g} \] Step 4: Calculate mass of solvent.
\[ \text{Mass of solvent} = 500 - 1.25 = 498.75~\text{g} \] Step 5: Conclusion.
Hence, the weight of solvent is \(498.75~\text{g}\).
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