Which of the following expression is correct for the rate of reaction given below ?
`5Br^(-)(aq) + BrO_(3)^(-)(aq) + 6H^(+) (aq) to 3Br_(2) (aq) + 3H_(2) O(l)` .

Options

A. `(Delta[Br^(-)])/(Delta t) = 5 (Delta[H^(+)])/(Delta)`
B. `(Delta[Br^(-)])/(Delta t) = (6)/(5) (Delta[H^(+)])/(Delta t)`
C. `(Delta[Br^(-)])/(Delta t) = (5)/(6) (Delta [H^(+)])/(Delta t)`
D. `(Delta[Br^(-)])/(Delta t) = 6 (Delta[H^(+)])/(Delta t)`

Answer

C

Explanation

For the reaction,
`5Br_((aq))^(-) + BrO_(3(aq))^(-) + 6H_((aq))^(+) to 3Br_(2(aq)) + 3H_(2)O_((l))`
Rate `= (-1 Delta)/(5) ([Br^(-)])/(Delta t) = - (Delta[BrO_(3)^(-)])/(Delta t) = (-1)/(6) (Delta[H^(+)])/(Delta t)`
`:. (Delta [Br^(-)])/(Delta t) = (5)/(6) (Delta[H^(+)])/(Delta t)`