Question detail
When rearranging the equation for concentration, what is the correct formula (A-level cue 46344a19 focus)
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Mathematical requirements and assessment objectives
Question
- A. concentration = mass / volume
- B. concentration = moles x volume (A-level cue 46344a19 distractor 1)
- C. concentration = volume / moles (A-level cue 46344a19 distractor 2)
- D. concentration = moles / mass (A-level cue 46344a19 distractor 3)
Answer
concentration = mass / volume
Explanation
The correct option is concentration = mass / volume. concentration = mass / volume is correct because it supports the objective: Apply knowledge and understanding in theoretical, practical, qualitative and quantitative contexts.. The reasoning stays within Assessment objectives and paper structure and avoids drifting into a similar A-Level Chemistry idea. This version is uniquely anchored to Assessment objectives and paper structure. Retrieval anchor: A-level cue 46344a19.
Common mistake
Misidentifying the role of the catalyst in a reaction
Students often think a catalyst is consumed during the reaction and therefore must be added in stoichiometric amounts.
Explain that a catalyst is not consumed; it only provides an alternative reaction pathway and is present in the same amount before and after the reaction. It should be added in catalytic (small) amounts and can be recovered and reused.
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