Question

THE IODINE CLOCK- REACTION KINETICS IN-LAB GUIDELINES (WEEK 1) This is a guide to suggest a format for you to prepare your laboratory notebook so that you can efficiently collect and record the data needed for each part of this experiment. Provide a space for observations. Record all original data directly into the laboratory notebook. Show all post-lab calculations in your laboratory notebook. If you did several trials of the same experiment, show calculations for the first trial, and tabulate your results for all subsequent trials. Include a summary of your results in your written report DATA AND PRELIMINARY CALCULATIONS (WEEK 1) PART I: RATE AS A FUNCTION OF CONCENTRATION Room Temperature - 24 1 °C Mixture 1 Volume (mL) 0.200 M KI 0.10 M (NH),s,o, 0.005 M Na,s,o, Water 10.00 10.00 5.00 10.00 5.00 10.00 5.00 5.00 10.00 5.00 5.00 5.00 Total 2500 25.00 25.00 Mixture 2 Mixture 3 [I-), M (5,0,?], M Time, s Initial Rate, M/s Average Initial Rate, M/s "Mixture 1 0.08 0.08 M 45.105 43.035 1:51.075 Mixture 2 10.04 M 0.08M IND SECOND TRUL ixture 30.08M10.04M No Skend ten | 3 | THE IODINE CLOCK-REACTION KINETICS: DATA AND CALCULATIONS

equations that may be useful are:

2I(-)+SO2O8(2-)->I2+2SO4(2-)

and

I2+2S2O3(2-)->2I(-)+S4O6(2-)

Answer 1

Reaction of persuade (S_2 O_8^-2) and Iodide (I^-) Ions produce Iodine rightarrow Here the rate of consumption of Iodine will be measured to determine rate of reaction. (because it is equal to rate of production of Iodine in equation I) rightarrow Iodine formed in reaction I reacts with we added. This contribute until all S_2 O_3^-2 is consumed. so by measuring the time taken for known amount of to be consumed, the rate of production of Iodine diving that time can be calculated rate = [I_2]/t = 1/2 Delta [S_2)_3^-2]/time final [S_2 O_3^-2] = 0 initial [S_2 O_3^-2] = molar of S_2 O_3^-2/Total volume of solution \r\n = 5 ml times 0.004 m/25 ml [S_2 O_3^-2] = 0.001 M Reaction rate is measure of how much 70 dine was produced in the time it took for the reaction to blue (i.e times taken to react all of present) Mixture