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Iodine Reaction

Iodine Reaction. Chemical Engineering Lab 1. Objectives. To calculate the order of reaction, rate constant, and activation energy To study the effect of temperature towards the reaction rate constant. Review. Let’s look at a iodine reaction:. Main reaction. K-persulfate. K-sulfate.

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Iodine Reaction

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  1. Iodine Reaction Chemical Engineering Lab 1

  2. Objectives • To calculate the order of reaction, rate constant, and activation energy • To study the effect of temperature towards the reaction rate constant

  3. Review Let’s look at a iodine reaction: Main reaction K-persulfate K-sulfate Side reaction Na-thiosulfate Na-tetrathionate k1 > k2 Main reaction is FASTER than side reaction If k1 < k2 Main reaction is SLOWER than side reaction

  4. Investigate the main reaction In an ionic reaction form gas The equation of rate of reaction becomes:

  5. Manipulation • To evaluate “n”, the concentration of KI must be very high (excess) so that it can be considered as constant, hence k1.[KI]m = k* • Using the same way, you can do for evaluating “m”

  6. Calculate “n” and “m” • “n” and “m” can be obtained from the experimental data (Iodine Reaction I and II) • However, “k” is depending on T. Evaluate “k” by varying T (Iodine Reaction III)

  7. Arrhenius equation CONSTANT Use a linear regression method to calculate all the constants

  8. Thank you

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