O-LevelChemistryRates of Reaction5070/11 · Oct/Nov 2023 · Q181 Mark
Aqueous bromine is an equilibrium mixture. Br2(aq) + H2O(l) ⇋ OBr¯(aq) + Br¯(aq) + 2H+(aq) Aqueous bromine is orange in colour. The species on the right-hand side of the equation are colourless. Changes are made to three separate portions of the equilibrium mixture. Which row shows how the colour of the mixture changes when a small amount of each substance is added? adding sulfuric acid, adding solid sodium bromide, adding water
Adarker orange, darker orange, darker orange
Bdarker orange, darker orange, paler orange
Cdarker orange, paler orange, darker orange
Dpaler orange, darker orange, paler orange
✓ Correct answer
B: darker orange, darker orange, paler orange
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