Question detail
Calculate the concentration in g/dm³ of a solution containing 10 g of solute in 2 dm³ of solution.
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. 5 g/dm³
- B. 10 g/dm³
- C. 15 g/dm³
- D. 20 g/dm³
Answer
5 g/dm³
Explanation
Concentration is calculated as mass divided by volume. Here, 10 g / 2 dm³ = 5 g/dm³.
Common mistake
Confusing Avogadro's Constant
Students often confuse the Avogadro constant with the number of particles in a specific mass of a substance instead of understanding it as a fixed number of particles in one mole.
Remember that Avogadro's constant (6.02 x 10^23) represents the number of atoms, molecules, or ions in one mole of any substance, regardless of its mass.
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