POST-LAB QUESTIONS (15 PTS.) (2) True or False: The reaction order with respect
ID: 1083985 • Letter: P
Question
POST-LAB QUESTIONS (15 PTS.) (2) True or False: The reaction order with respect to each reactant can be determined directly from the stoichiometry of the clock reaction: S,082·25203-25042-+5,062- 1. Based on your results in this experiment, provide at least one reason that supports your answer (2)12 appears faint yellow in aqueous solution to signal the com then what is the purpose of adding starch as an indicator? plete consumption of the limiting reagent, 2, 3. (2) Compare and contrast the rate constants at the same temperature and at different temperatures. Did the rate constant change as the temperature was raised? On a molecular level, explain why this happens.Explanation / Answer
Q Generally order can not be predicted from stiochiometry of the reaction because it is experimentally determined value depends upon the how rate is affected on changing the concentration of reactant for example if reaction is double on doubling the concentration of particular reactant then order with respect to that reactant will be 1 and of rate become 4 times than order with respect to that reactant is 4 times.
Q Starch forms deep blue solution with iodine and reaction is very fast between starch and iodine even small amount of iodine prepared which we can't see by fade yellow colour can be detected on owing to the formation of blue colour
Q Rate constant of reaction increases on increase the temperature because on increasing the temperature the fraction of molecule having high kinetics energy increases hence the more no of molecule can cross the energy barrier and more no of effective collision hence now more no of more no of molecule will convert in to product
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