Iodine Clock Abstract

The purpose of this experiment was to crack the effects of concent ration, temperature and a catalyst on the rove of the iodine-hydrogen peroxide reaction and to as considerably determine the prise law expression for the reaction. Mixture #1 which was make up of 10ml of KI, 15ml of Buffer, 5ml of Na2S2O3 and 15ml of H2O was prepared in an Erlenmeyer flask and terce drops of 3% starch (indicator) was added and the inter pleatture was stirred cautiously. The temperature (19.70C), pH (4.78) of the undulate was carefully obtained. An accu pose measurement of 5ml of H2O2 was then added to the mixing and the mix turned from a clear solution to a racy solution and then finally black. The reaction set (156.5s) (i.e cartridge holder taken from solution to turn from clear to blue) of the mix was carefully obtained. The aforesaid(prenominal) process was applied to mix #2, #3 and #4 precisely with contrary volumes of compounds and the temperature, pH and reaction duration was similarly carefully noted. For miscellanea #5, the composition from previous mixtures remained the alike(p) but 5ml of Mo(VI), a catalyst, was added. The temperature was duly noted and the reaction time (54.5s) was as well recorded. For mixture #6, the composition also remained the same but the temperature of the mixture was lowered to 100C and the reaction time (309s) was noted.

I realized that that in the presence of a catalyst, the reaction occurred at a high-velocity rate and when the temperature was decreased, the reaction rate was doubled. The constriction of the ions in the compounds was also calculated for every mixture with the dilution commandment (C1V1=C2V2) and the react ion rate was also calculated by compare a r! atio of the concentration of blue starch decomposable (S2032-) and reaction time. The rate constant was also calculated for mixtures #1 - #4. The order of the different reactions was calculated by substituting cognise values for rate and concentration into the rate law freehand rise to an general expression of 0.010[H2O2]1[I-]1[H+]0. There were a few errors that occurred during the...If you want to suck a full essay, order it on our website: OrderEssay.net

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