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Reaction Kinetics: The Iodination of Acetone
501
Gina Giacona &
Matt Campbell
Reaction Kinetics: The iodination of Acetone
Conclusion
Real World Applications
- The chemical reaction in this experiment is the iodination of acetone.
- In the experiment you will be observing the rate of consumption of the iodine (the limiting reactant) in the mixture of acetone, HCl, and H20.
- You will use the general rate law to to figure out the rate order of each reactant in this chemical reaction using rate and concentration data.
Chemical principles
Observations:
After adding the Iodine to the mixture of Acetone, HCl, and H20 we waited and timed how long the mixture would take to turn from a green brown color to a clear solution which signaled the end of the reactions.
During the experiment all solutions were leveled off to an even 50 mL volume using distilled water, the experiments with differing HCl and acetone measurements the mixtures with more of these chemicals reacted quicker. However in the Iodine experiment the more Iodine added the longer the reaction took.
Data, Tables, Observations
Data, Tables, Observations
Analysis, graphs, calculations
- You will use the rate law rate=k[acetone]x[I2]y[H+]z to find the rate constant
- plug your numbers into slope formula (Y2-Y1/X2-X1) and then analyze the graphs to figure out which slope aligns most accurately to find the order.
Analysis:Graphs and Calculations
As volume of Acetone increased rate of reaction increased. 2nd order
As volume of Iodine increased rate of reaction decreased. 0th order
As volume of HCl increased rate of reaction once again increased. 2nd order
Conclusion
Rate of reaction can be sped up or slowed down by different volumes of different chemicals used in your solution. By using a tinting chemical such as iodine as your limiting reactant you can actually see when your limited reactant is used up and thus the reaction is complete. Using your eyes and a stopwatch you can then compare the rate at which different mixtures complete.
Kinetics and rate law in everyday life
- Alcohol: Rate of metabolizing ethanol in body is much slower than rate of absorption in the blood. Can lead to poisoning.
Refrigeration: Storing food in a cool place slows down the rate of decay.