Question

__b__ 2. Given the following reaction: 5 Br-(aq) + BrO3-(aq) + 6 H+(aq) Br2(aq) + 3 H2O(l)

If the rate of disappearance of bromate ions, BrO3-, is 1.45 mol/Ls, what is the corresponding rate of disappearance of hydrogen ions?

Answer 1

From the stoichiometry, 6 H+ are consumed per 1 BrO3−. So

rate(disappearance of H+) = 6 × 1.45 = 8.70 mol·L⁻¹·s⁻¹.

(As a time derivative: d[H+]/dt = −8.70 M s⁻¹.)