AgNO₃(aq) is added to a solution of a halide ion, X⁻(aq), and aqueous ammonia is then added. The ionic equations for the two reactions that occur are shown. Ag⁺(aq) + X⁻(aq) ⇌ AgX(s) equilibrium 1 Ag⁺(aq) + 2NH₃(aq) ⇌ Ag(NH₃)₂⁺(aq) equilibrium 2 Which statement is correct?
✓ Correct Answer
The correct answer is B: Increasing the concentration of ammonia causes the position of equilibrium 1 to move to the left.
📋 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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