A large excess of marble chips is reacted with 25 cm³ of 1.0 mol dm⁻³ hydrochloric acid at 40 °C. How is the result different when the reaction is repeated with 60 cm³ of 0.5 mol dm⁻³ hydrochloric acid at 40 °C?
✓ Correct Answer
The correct answer is C: The reaction is slower and more of the products are made when the reaction is complete.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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