A 250 mL solution contains 7.5 g solute. What is the mass by volume percentage?
Answer and explanation
Correct answer: 3 percent
Mass by volume percentage means grams of solute present in 100 mL of solution. Use the formula: percentage = (mass of solute ÷ volume of solution) × 100. Thus, (7.5 ÷ 250) × 100 = 3%. Therefore, option C is correct; the other values result from using an incorrect factor or confusing mass percentage with mass-volume percentage.
Frequently asked questions
What is the correct answer to this question?
3 percent
Why is this the correct answer?
Mass by volume percentage means grams of solute present in 100 mL of solution. Use the formula: percentage = (mass of solute ÷ volume of solution) × 100. Thus, (7.5 ÷ 250) × 100 = 3%. Therefore, option C is correct; the other values result from using an incorrect factor or confusing mass percentage with mass-volume percentage.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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