What is the rate at which Br⁻(aq) disappears in the reaction below if the rate of disappearance of BrO₃⁻(aq) is 0.072 M/s? BrO₃⁻ + 5 Br⁻ + 6 H⁺ → 3 Br₂ + 3H₂O

Answer 1

BrO₃^- + 5Br^- + 6H⁺ ==> 3Br₂ + 3H₂O

-d BrO₃^-/dt = - 1/5d Br^-/dt = -1/6 dH⁺/dt = 1/3 dBr₂/dt = 1/3 dH₂O/dt

0.072 = 1/5 Br-

Br- = 0.36

So the rate of disappearance of Br- would be 0.36 M/s (or 5 x that at which BrO3- disappears)