A-LevelChemistryEquilibriaMay/June 2010Paper 1 Q91 Mark
The table gives the concentrations and pH values of the aqueous solutions of two compounds, X and Y. Either compound could be an acid or a base. X Y concentration 2 mol dm⁻³ 2 mol dm⁻³ pH 6 9 Student P concluded that X is a strong acid. Student Q concluded that the extent of dissociation is lower in X(aq) than in Y(aq). Which of the students are correct?
Aboth P and Q
Bneither P nor Q
CP only
DQ only
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of equilibria within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 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...
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