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  • Which of the following expressions is correct for the rate of reaction given below ?

Which of the following expressions is correct for the rate of reaction given below?

5Br^{}-(aq)+BrO_{3}^{}-(aq)+6H^{}+(aq)\rightarrow 3Br_{2}(aq)+3H_{2}O(l)

(i) \frac{\Delta [Br^{-}]}{\Delta t}=5\frac{\Delta [H^{+}]}{\Delta t}

(ii) \frac{\Delta [Br^{-}]}{\Delta t}=\frac{6}{5}\frac{\Delta [H^{+}]}{\Delta t}

(iii) \frac{\Delta [Br^{-}]}{\Delta t}=\frac{5}{6}\frac{\Delta [H^{+}]}{\Delta t}

(iv) \frac{\Delta [Br^{-}]}{\Delta t}=6\frac{\Delta [H^{+}]}{\Delta t}

 

Answers (1)

We can rewrite the rate law expression for the given equation

5Br^{}-(aq)+BrO_{3}^{}-(aq)+6H^{}+(aq)\rightarrow 3Br_{2}(aq)+3H_{2}O(l)

-\frac{1}{5}\frac{\Delta [Br^{-}]}{\Delta t}=-\frac{\Delta [BrO_{3}^{-}]}{\Delta t}=-\frac{1}{6}\frac{\Delta [H^{+}]}{\Delta t}=\frac{1}{3}\frac{\Delta [Br_{2}]}{\Delta t}

-\frac{\Delta [Br^{-}]}{\Delta t}=-\frac{\Delta [BrO_{3}^{-}]}{\Delta t}=-\frac{5}{6}\frac{\Delta [H^{+}]}{\Delta t}

\frac{\Delta [Br^{-}]}{\Delta t}=\frac{5}{6}\frac{\Delta [H^{+}]}{\Delta t}

(iii) \frac{\Delta [Br^{-}]}{\Delta t}=\frac{5}{6}\frac{\Delta [H^{+}]}{\Delta t}

Posted by

infoexpert23

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