For the reaction BrO₃^- + 5Br^- + 6H⁺ → 3Br² + 3H₂O at a particular time,-Δ[BrO₃^-]/Δt = 1.5 × 10^-2 M/s.What is -Δ[Br^-]/Δt at the same instant?

Question

Quizplus · Accepted Answer

The rate of disappearance of Br⁻ is five times the rate of disappearance of BrO₃⁻ because the stoichiometry of the reaction shows that 5 moles of Br⁻ react with 1 mole of BrO₃⁻. Therefore, -Δ[Br⁻]/Δt = 5 × 1.5 × 10⁻² M/s = 7.5 × 10⁻² M/s.

For the Reaction BrO3- + 5Br- + 6H+ → 3Br2

For the Reaction BrO₃^- + 5Br^- + 6H⁺ → 3Br²