A 250 g solution contains 25 g solute. What is the mass percentage?
Answer and explanation
Correct answer: 10 percent
Mass percentage is calculated using the governing formula: mass percent = (mass of solute ÷ mass of solution) × 100. Substitution gives (25 g ÷ 250 g) × 100 = 0.1 × 100 = 10%. Therefore option A is correct. The value 25 g is only the solute mass, while 2.5% results from an arithmetic error; 100% would mean the whole sample is solute.
Frequently asked questions
What is the correct answer to this question?
10 percent
Why is this the correct answer?
Mass percentage is calculated using the governing formula: mass percent = (mass of solute ÷ mass of solution) × 100. Substitution gives (25 g ÷ 250 g) × 100 = 0.1 × 100 = 10%. Therefore option A is correct. The value 25 g is only the solute mass, while 2.5% results from an arithmetic error; 100% would mean the whole sample is solute.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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