A-LevelChemistryAtoms, molecules and stoichiometryMay/June 2023Paper 3 Q111 Marks
Read through the whole method before starting any practical work. Where appropriate, prepare a table for your results in the space provided. Show the precision of the apparatus you used in the data in record. Show your working and appropriate significant figures in the final answer to each step of your calculations. 1 In this experiment you will determine the relative atomic mass, A,, of metal M by thermal decomposition of its basic carbonate, MCO3•M(OH)2. FB 1 is the basic metal carbonate, MCO3•M(OH)2.
📋 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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