A-LevelChemistryGroup 17May/June 2016Paper 1 Q181 Mark
An excess of chlorine gas, Cl₂, is passed through 60 cm³ of cold aqueous 0.1 mol dm⁻³ sodium hydroxide. In a separate experiment an excess of chlorine gas is passed through 60 cm³ of hot aqueous 0.1 mol dm⁻³ sodium hydroxide until no further reaction takes place. How much more sodium chloride will be produced by the reaction with hot NaOH than with cold NaOH?
A0.002 moles
B0.003 moles
C0.005 moles
D0.006 moles
✓ Correct Answer
The correct answer is A: 0.002 moles
📋 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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