Hi I\'m in general chemistry part 2. And we are learning kinetics. We did the ex

Question

Hi I'm in general chemistry part 2. And we are learning kinetics. We did the experiment "visual clock reaction" and I'm having trouble filing the table. Can someone guide me on how to work it out. Thanks a 0.20 M KI 20 20 20 15 10 20 20 b 0.0050 M Na,S20, 10 5 20 20 in a 0.4% starch soln. 10 10 10 10 10 10 10 10 10 c 0.2 M KCl 15 d 0.1 M K2SO4 15 10 e 0.10 M K2s2Os 20 20 20 20 20 20 15 10 5 20 f 0.1 M CuSO. 1 drop B. effects on reaction rates. To study the effect of temperature on the Temperature reaction rate, run 1 will be repeated at several temperatures. The flask co a and b will be heated or cooled and then solution e (at room temperature) will be added. It will be assumed that quick mixing will result in the same temperature for the whole solution. The temperature will be measured immediately after the purple color appears. For each run, add 20 mL of solution a and 10 mL of solution b to the first flask. Add 20 ml of solution e to the second flask. Change the temperature of the first flask to about the valu indicated below. Quickly add solution e, and stir. Record the elapsed fo the purple to appear and measure the temperature of the solution. Repeat the procedure for th inino nuns. To raise the temperature ofa suspend the flask in a beaker of and he Riansen burner. To lower the temperature of a flask, swirl t

Explanation / Answer

With the help of that type of experiment we can study the effects of concentration,temperature and catalysts on a reaction rate.In this reaction we are study about the oxidation of iodide ion by the strong oxidizing agent peroxydisulfate ion (S2O82–). 2 I– (aq) + S2O82– (aq) I2 (aq) + 2 SO42– (aq). In this part of the experiment the concentrations of reactants will be vary (as mention on the top of table).In the given part of the experiment, the reaction is carried out with the different initial concentrations of reactants.That may be done by varying the amount of any reactant either iodide ion or peroxydisulfate ion used in that reaction.So in the given table you have to fill the Volume with concentration of the reactants

In the above part the reaction was performed with the variation of the concentration of the reactant but the temperature remains constant .

In in second type of experiment the concentrations of the reactants will remains constant and the temperature will be varied.By a small change in temperature there may be a large change in the rate of reaction.For any typical chemical reaction when we increase the temperature by 10°C from room temperature the rate of reaction will be approx twice.Because at room temperature very few collisions are there between reactants and by increasing the temperature they attain Threshold energy(Minimum Energy required for effective Collisions for the formation of product).So a small change in temperature can have a considerable change on the rate of reaction.

In this section of the experiment, the concentrations of reactants will be the same but there is a variation in temperature and measure the effect of catalyst.We have to make a table for such observations

We have to perform the reactions at different temperatures-

T1 - 5°C to 10°C

T2 - 10°C to 20°C

T3 - 20°C to 30°C

T4 - 30°C to 40°C

T5 - 40°C to 50°C

further you may proceed for calculations

Reaction Volume of solution in first cylinder. (I– ) Volume of solution in second cylinder (S2O82–) Volume in beaker (S2O32–) 1 20 ml 0.20M 10ml 0.10M 10ml with starch 2 15ml 0.20M 10ml 0.10M 10ml with starch

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