The questions are: 6. What additonal experiments could you perform to determine

Question

The questions are:

6. What additonal experiments could you perform to determine the value of the activation energy for the catalyzed reaction?

7. What is one difficulty you might face in performing the experiment that you described in your answer to the previous question? How might you overcome this difficulty?

Also, is this reaction endothermic or exothermic?

6 I (aq) +BrO3 (aq) + 6 H+ (aq) 3 I2 (aq) +Br (aq) + 3 H2O (l)

and

I2(aq) + 2 S2O3 2 (aq) 2 I (aq) + S4O6 2 (aq)

Thanks in advance!

Table 1: Volumes of Reagents to be Used in the Reaction Mixture:s (All volumes in milliliters unless otherwise specified) Reaction Flask l (250 mL Flask ll (125 mL Mixture 0.010 MKI H2O 10.0 0.040 M KBrO3 0.10 M HClI 10.0 20.0 10.0 10.0 0.0010 M Na2S2O 10.0 10.0 10.0 10.0 10.0 10.0 20.0 10.0 10.0 10.0 10.0 20.0 Starch 3-4 drops 3-4 drops 3-4 drops 3-4 drops 2 4

Explanation / Answer

6. To determine the value of activation energy we need to plot a graph between lnK and 1/T..Which is straight line having slope -Ea/RT .

So before that we need to calculate rate constant at different Temperature in presence of caalyst.

So different trial for rate constant and temp should be done.

7. This reaction will happen so quickly.so necessary and carefull action may not be lead to accurate measurement,so one should do one thing that, do the reaction at lower temperature so that reaction rate can be lowered and measurement will have accurate values.

6 I (aq) +BrO3 (aq) + 6 H+ (aq) 3 I2 (aq) +Br (aq) + 3 H2O (l)

above reaction is exothermic

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