FHS AP Chemistry: Friday - December 12th, 2025

Daily Objective:

Students will analyze reactions to determine the rate at which they occur, and will be able to predict the rates of various reactions.

Bellwork:

The reaction

5Br⁻ (aq) + BrO₃⁻ (aq) + 6H⁺ (aq) → 3Br₂ (l) + 3H₂O (l)

is expected to obey the mechanism

BrO₃⁻ (aq) + H⁺ (aq) → HBrO₃ (aq)

HBrO₃ (aq) + H⁺ (aq) → H₂BrO₃⁺ (aq)

H₂BrO₃⁺ (aq) + Br⁻ (aq) → (Br—BrO₂) (aq) + H₂O (l)

(Br—BrO₂) (aq) + 4Br⁻ (aq) + 4H⁺ (aq) → products

If the rate law for this reaction is Rate = k[BrO₃^-][Br^-][H⁺]², which step in the mechanism above is the slow step? Explain your answer.

Daily Plan:

Homework:

Prepare for the semester final exam!

FHS AP Chemistry