Question detail
Calculate the concentration in g/dm³ of a solution containing 5 grams of solute 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. 10 g/dm³
- B. 5 g/dm³
- C. 2.5 g/dm³
- D. 15 g/dm³
Answer
10 g/dm³
Explanation
Concentration is calculated as mass divided by volume, so 5 g / 0.5 dm³ = 10 g/dm³.
Common mistake
Confusing Mole Symbol
Students often write 'M' instead of 'mol' when stating the unit for moles.
Remember that the correct symbol for the unit mole is 'mol', not 'M'. Keep the correction anchored to Moles (HT only); check formula, substitution, calculation, final answer, and unit where relevant.
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