Question:
A solution is 0.50% by weight. What is the weight of solvent containing 2.50 g solute?
A solution is 0.50% by weight. What is the weight of solvent containing 2.50 g solute?
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Always find the mass of solution first while solving weight percentage problems.
Updated On: Feb 11, 2026
- 497.5 g
- 125.0 g
- 500.1 g
- 502.5 g
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The Correct Option is A
Solution and Explanation
Step 1: Write the formula for weight percent.
\[ %\ \text{by weight} = \frac{\text{mass of solute}}{\text{mass of solution}} \times 100 \]
Step 2: Substitute the given values.
\[ 0.50 = \frac{2.50}{\text{mass of solution}} \times 100 \]
Step 3: Calculate mass of solution.
\[ \text{mass of solution} = \frac{2.50 \times 100}{0.50} = 500\ \text{g} \]
Step 4: Calculate mass of solvent.
\[ \text{mass of solvent} = \text{mass of solution} - \text{mass of solute} \]
\[ = 500 - 2.50 = 497.5\ \text{g} \]
Step 5: Conclusion.
The weight of solvent required is 497.5 g.
\[ %\ \text{by weight} = \frac{\text{mass of solute}}{\text{mass of solution}} \times 100 \]
Step 2: Substitute the given values.
\[ 0.50 = \frac{2.50}{\text{mass of solution}} \times 100 \]
Step 3: Calculate mass of solution.
\[ \text{mass of solution} = \frac{2.50 \times 100}{0.50} = 500\ \text{g} \]
Step 4: Calculate mass of solvent.
\[ \text{mass of solvent} = \text{mass of solution} - \text{mass of solute} \]
\[ = 500 - 2.50 = 497.5\ \text{g} \]
Step 5: Conclusion.
The weight of solvent required is 497.5 g.
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