O-LevelChemistryRates of Reaction5070/11 · May/June 2024 · Q191 Mark
157.75 g of bismuth(III) chloride, BiCl₃, is used to make 500 cm³ of solution using distilled water. The aqueous bismuth(III) chloride slowly becomes cloudy as it reacts with water to form insoluble BiOCl. The reaction is reversible. BiCl₃(aq) + H₂O(l) ⇌ BiOCl(s) + 2HCl(aq) Which statements are correct? 1 The initial concentration of the bismuth(III) chloride solution is 1.0 mol/dm³. 2 At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. 3 When more hydrochloric acid is added, the position of equilibrium moves to the left. [Ar: Bi, 209; Cl, 35.5]
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct answer
A: 1, 2 and 3
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