Question detail
Calculate the volume in dm³ of a solution if 12 g of solute is present and the concentration is 4 g/dm³.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
- A. 2.5 dm³
- B. 3 dm³
- C. 4 dm³
- D. 5 dm³
Answer
3 dm³
Explanation
Volume can be calculated using the rearranged formula: volume = mass / concentration. Here, volume = 12 g / 4 g/dm³ = 3 dm³.
Common mistake
Confusing Concentration Units
Students often confuse mass concentration (g/dm^3) with amount concentration (mol/dm^3), leading to incorrect calculations.
To fix this, remember that mass concentration measures the mass of solute per volume of solution, while amount concentration measures the number of moles of solute per volume of solution. Always check which unit is required for the calculation. Keep the correction anchored to Concentration of solutions; check formula, substitution, calculation, final answer, and unit where relevant.
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