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A-LevelChemistryAnalytical techniquesMay/June 2017Paper 3 Q222 Marks

When baking soda is heated, carbon dioxide is produced. In this experiment you will investigate the reaction taking place when the sodium hydrogencarbonate in baking soda is thermally decomposed. FA 4 is baking soda (impure NaHCO3). Its composition is the same as that of FA 2.

Q: What topic does this question test?

This question tests Analytical techniques in A-Level Chemistry (syllabus code 9701). It is worth 22 marks.

📋 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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About This A-Level Chemistry Question

Topic

This structured question tests Analytical techniques in A-Level Chemistry (syllabus code 9701). It is worth 22 marks.

Source

This question appeared in the Cambridge A-Level Chemistry May/June 2017 examination, Paper 3 Variant 3.

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