Kinetics of the Decomposition of Hydrogen Peroxide Lab Essay Example

a 250 ml Erlenmeyer flask. The flask must then be swirled in the water bath to allow the solution to succumb to the same temperature. Once that has been done, 5 ml of 3% of H2O2 must be added to solution in the Erlenmeyer flask and a stopper must then be immediately placed on the flask. For this next step, one person must swirl the flask in the bath at all times until the trial is over, at a slow even pace and monitor the time.

The other person must then monitor the volume of oxygen evolved and lower, or raise the leveling bulb. The leveling bulb must be leveled with the amount of water in the buret at all times. Timing should begin after 2 ml of oxygen has been produced and must be recorded at 2 ml intervals until 14 ml of oxygen has accumulated. After recording the time, the first part of the experiment is now complete.

The next step in this lab is to rinse the Erlenmeyer flask with distilled water down the drain and then repeat the experiment, this time adding 10 ml of 0. 0M KI and 10 ml of distilled water to the flask instead. The flask should again be swirling to allow the solution to succumb to the same temperature as the water bath and once it has reached the same temperature, 10 ml of 3% H2O2 must then be added and a stopper must be immediately placed on the flask and recording should then begin for experiment two. After recording the times, the Erlenmeyer flask must then be rinsed again with distilled water down the drain. After rinsing

the flask, the last part of the lab can now be performed.

Experiment three is performed the same way, but instead, 20 ml of 0. 10 ml M KI and 5 ml of distilled water will be added and after the swirling of the flask, 5 ml of 3% H2O2 will be added. After the times have been recorded, data collection should now be complete.