A-LevelChemistryEquilibria9701/12 · Oct/Nov 2025 · Q121 Mark
An equilibrium can be represented by the equation shown. P(aq) + Q(aq) ⇌ 2R(aq) + S(aq) In a certain mixture, of volume 1.0 dm³, the equilibrium concentration of Q is 10 mol dm⁻³. What will be the new equilibrium concentration of Q if 5.0 mol of pure Q is completely dissolved in the mixture?
A15 mol dm⁻³
Bbetween 10 mol dm⁻³ and 15 mol dm⁻³
C10 mol dm⁻³
Dbetween 5.0 mol dm⁻³ and 10 mol dm⁻³
✓ Correct answer
B: between 10 mol dm⁻³ and 15 mol dm⁻³
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