Iodination of Acetone
Temperature as a Variable
The objective of this lab is to determine the energy of activation of the iodination of acetone. This will be done by performing the reaction at differing temperatures. The same reaction orders we obtained for the previous lab will be incorporated into this experiment. The equation Ea = -8.31 x slope of ln k vs. 1/T(K) will be used to determine the energy of activation required for this this reaction.
We predict that the change in temperature will affect the timing of the reaction because when the temperature is higher, there's more energy and less energy at lower temperatures and atoms move around more at higher temperatures because of …show more content…
Then we poured water in the 500 mL beaker that was at room temperature, and put ice cubes into it to get it to a desired temperature (22 degrees Celsius).
5. Into a graduated cylinder, we carefully poured 10mL of Acetone from the buret, 10mL of HCL, and 20mL of distilled water. Once we had those three in the gradated cylinder we put 10mL of iodine in a test tube and we placed both in the 500 mL beaker with thermometers in each solution to ensure that they were all the same temperature when we added the iodine. As soon as all the solutions reached the desired temperature (22 degrees Celsius) we poured the iodine into the graduated cylinder and started timing the reaction.
6. As soon as the reaction stopped, we stopped the stopwatch, recorded the time and carefully poured the solution into a test tube and recorded the temperature.
7. We emptied the beaker of the previous equipment leaving the water and put the beaker with water onto a heater with a magnetic stirring rod and heated it up to the desired temperature (30 degrees Celsius).
8. We repeated step 5 in the procedure to 30 degrees Celsius and then repeated step 6 and recorded the time and …show more content…
|Time for reaction at room temp |203 sec |26 °C |299 K |
| |TIME |TEMPERATURE |TEMPERATURE |
| |Seconds |°C |Kelvin |
|Below Ambient |279 sec |22 °C |295 K |
|Above Ambient |161 sec |30 °C |303 K |
|Ambient |203 sec |26 °C |299 K |
| |RATE |k |In k |1/T(K) |
|~22 °C |3.58 x10-6 |1.25 x10-4 |-8.987 |3.39 x10-3