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Which of the following expression is co...

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)` .

A

`(Delta [Br^(-)])/(Delta t)= (5)/(6) (Delta [H^(+)])/(Delta t)`

B

`(Delta [Br^(-)])/(Delta t)= (6)/(5) (Delta [H^(+)])/(Delta t)`

C

`(Delta [Br^(-)])/(Delta t)= (5 Delta [H^(+)])/(Delta t)`

D

`(Delta [Br^(-)])/(Delta t)= (6 Delta [H^(+)])/(Delta t)`

Text Solution

Verified by Experts

The correct Answer is:
A
The given chemical reaction is `5Br^(-) (aq) + BrO_(3)^(-) (aq) + 6H^(+) (aq) rarr 3Br_(2)(aq) + 3H_(2)O(l)`
Rate law expression for the given reaction can be written as `-(1)/(5) (Delta [Br]^(-))/(Delta t)= - (Delta [BrO_(3)^(-)])/(Delta t)`
`-(1)/(6) (Delta [H^(+)])/(Delta t)= + (1)/(3) (Delta [Br_(2)])/(Delta t)`
`rArr - (Delta [Br^(-)])/(Delta t)= - (5Delta [BrO_(3)^(-)])/(Delta t)= - (5)/(6) (Delta [H^(+)])/(Delta t)`
`rArr (Delta [Br^(-)])/(Delta t)= (5)/(6) (Delta [H^(+)])/(Delta t)`
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