Co2 Production Lab Report

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Introduction
For this experiment, the goal was to establish whether or not increased CO2 production would affect the time it took for the BTB to turn from blue to yellow when blown into. Bromothymol blue reacts with acidic substances, and since that is exactly what CO2 is, a reaction occurs. Based on this information, it would make sense that when you exercise, CO2 production increases and the BTB would be exposed to more of it therefore increasing the speed of the reaction. Students’ task was to exercise and monitor changes in the reaction time of the BTB. The exercise is believed to increase CO2 levels in the body through elevated cellular respiration. Cellular respiration is the process cells go through to create energy, which is scientifically …show more content…

Although there was not significant change, it was there. Since having exactly 5 drops of BTB and 5 millilters of water in the test tube each time was nearly impossible, there is potential that the inconsistency skewed the results.

Discussion

As predicted, the time it took for the bromothymol blue to turn to yellow decreased after more amounts of exercise. The subjects heart rates increased the more they ran up and down stairs as the body needed to use the bloodstream to bring more oxygen to the muscles. To let your bloodstream provide more oxygen, the heart begins beating hard and fast (“New Health Advisor”, 2016) to move blood quicker. This concludes the hypothesis that the time will decrease due to more CO2 being released. The data showed more average decrease in the times in the females rather than the males. This could be a variety of things, but based on what was observed it is fairly reasonable to suspect those factors on stamina. There are athletic girls, but on average males seem to naturally have more endurance. SInce that is the case, they have an easier time with breath as they would not have to work quite as hard. As less oxygen is being brought to the muscles, more is being exhaled, so it would take more breath to release a decent amount of CO2 to change the color of the BTB.

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