Reducing agent oxidising agent species reduced

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Reducing agent Oxidising agent Species reduced Species oxidised Reaction 2 Al (s) + 3 Cl 2 (g) ® 2 AlCl 3 (s) 8 H + (aq) + MnO 4 - (aq) + 5 Fe 2+ (aq) ® 5 Fe 3+ (aq) + Mn 2+ (aq) + 4 H 2 O (l) FeS (s) + 3 NO 3 - (aq) + 4 H + (aq) ® 3 NO (g) + SO 4 2- (aq) + Fe 3+ (aq) + 2 H 2 O (l)
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Marking scheme Criteria Maximum mark Mark awarded Task 1 Observations must have sufficient detail that they will be meaningful in a few weeks’ (or months’) time (1 mark) Reasonable attempts at completing net ionic equations (1 mark for attempt. award mark even if some equations are incorrect) All net ionic equations include states (1 mark: all or nothing) Pick two reactions – the same two reactions for everyone in the class, chosen before any marking is started (but not announced to the class) – and mark for correctness . Two net ionic equations completely correct (1 mark: all or nothing) 4 Task 2 Reasonable attempt at completing table (1 mark for attempt. award mark even if some entries are incorrect) Observations must have sufficient detail that they will be meaningful in a few weeks’ (or months’) time (2 marks: all or nothing) Pick one row of the table – the same row for everyone in the class, chosen before any marking is started (but not announced to the class) – and mark for correctness . One row of the table completely correct (2 marks: all or nothing) 5 Task 3 (there are six tables for equations and brief summary table) Reasonable attempts at completing net ionic equations (3 marks for reasonable attempt at all six tables; 2 marks if reasonable attempt at 3 or 4 tables; 1 mark if reasonable attempt at 1 or 2 tables. Award mark(s) even if some equations are incorrect) All equations include states (2 marks: all or nothing) Pick two reactions – the same two reactions for everyone in the class, chosen before any marking is started (but not announced to the class) – and mark for correctness .
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  • Fall '19
  • Chemical reaction

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