Question detail
Calculate the concentration in g/dm³ of a solution containing 10 grams of potassium nitrate (KNO3) in 0.5 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. 20 g/dm³
- B. 25 g/dm³
- C. 15 g/dm³
- D. 30 g/dm³
Answer
20 g/dm³
Explanation
The concentration is calculated using the formula concentration = mass / volume. Here, concentration = 10 g / 0.5 dm³ = 20 g/dm³.
Common mistake
Confusing Mole Concept
Students often think that one mole of different substances contains different numbers of particles.
Emphasize that one mole of any substance, regardless of its type, contains the same number of particles, which is defined by the Avogadro constant (6.02 x 10^23).
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