A-LevelChemistryReaction kineticsFeb/Mar 2022Paper 1 Q111 Mark
Hydrogen peroxide, H₂O₂, decomposes to form water and oxygen. The reaction is catalysed by bromide ions. step 1 2Br⁻(aq) + H₂O₂(aq) + 2H⁺(aq) → 2H₂O(l) + Br₂(aq) step 2 H₂O₂(aq) + Br₂(aq) → 2Br⁻(aq) + 2H⁺(aq) + O₂(g) Which row is correct? [Figure 11.1]
Aheterogeneous, bromide ions are oxidised
Bheterogeneous, bromide ions are reduced
Chomogeneous, bromide ions are oxidised
Dhomogeneous, bromide ions are reduced
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The correct answer is C. This question tests the candidate's understanding of reaction kinetics within the Chemistrysyllabus. The examiner's mark scheme requires...
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