5 g solute is dissolved and the final volume of solution is made 250 mL. What is the mass by volume percent?
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Answer and explanation
Correct answer: 2 percent
Mass by volume percent means grams of solute in 100 mL of final solution. From 5 g in 250 mL, the amount corresponding to 100 mL is 5 × 100/250 = 2 g. Therefore the concentration is 2% (m/v). The final volume, rather than the volume of solvent before dissolving, must be used as the basis.
Frequently asked questions
What is the correct answer to this question?
2 percent
Why is this the correct answer?
Mass by volume percent means grams of solute in 100 mL of final solution. From 5 g in 250 mL, the amount corresponding to 100 mL is 5 × 100/250 = 2 g. Therefore the concentration is 2% (m/v). The final volume, rather than the volume of solvent before dissolving, must be used as the basis.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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