It is obvious that the acidic substance produced the most reaction, even when the stopper popped off for a second. The pressure rose over 150 kPa in less than two minutes. I also think that this had to do with the carbonation being released at the same time and putting a little more yeast than was necessary into the test tube. The basic substance produced a very similar result, but did not equal the pressure from the soda. The pressure started out really high, but didn't increase a whole lot after about 30 seconds. The neutral substance had a very small reaction and didn't increase the pressure much. I don't understand why we mixed all of the substances with hydrogen peroxide, but it may be because we needed a little bit more liquid and hydrogen peroxide has very simple elements. Graphs below. Order is Acid, Base, Neutral.
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