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To determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution. Free essay! Download now

Home > GCSE > Chemistry > To determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution.

To determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution.

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Downloads to date: N/A | Words: 198 | Submitted: 31-Mar-2011
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To determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution. essay previewTo determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution. essay preview

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To determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution.

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Objective:

To determine the activation energy of the reaction between bromate ion and bromate(V) ion in acid solution.

Discussion

3Br2(aq) + C6H5OH (aq) C6H5Br3OH(s) +3H+(aq) + 3Br-(aq)

Methyl red was used because the solutions are colourless, the end point cannot be determined. However, using methyl red as indicator to give some color to the solution, at the end point the solution was bleached from red to colorless.

No, as the rate of reaction increase directly proportional to the temperature, at the temperature=80oC, the rate is so fast that tme interval connot be measured.

It is because the time noted is the time when the solution has just been decolourised, therefore, how far the reaction has proceeded is not a factor.

From Arrhenius equation, we have k = Ae-Ea/RT, where A is Arrhenius constant.

a) Yes, as all concentration terms have been kept constant. Therefore, the rate only varies as k, and the rate is directly proportional to 1/t & varies as k in the rate equation. We can substitute k by 1/t.


b) By taking natural logarithm of k = Ae-Ea/RT, we have:
ln k = (- Ea/RT)+ ln A

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