This isn't too scientific or anything, since it's been a while since I took chem, but it could be that the solution was only able to hold a certain concentration of CO2. If your shortest blowing time was enough to completely saturate it, then the other trials with longer blowing times might have simply bumped the CO2 out, keeping it at the same concentration.
That's my best guess. Be sure you mention human error as a possibility, too, if you're doing a lab report.
I'm doing a lab report for a cellular respiration experiment. My experiment involves blowing/exhaling CO2 into Bromothymol blue solution until it turns yellow, then adding drops of Nh3 (ammonia) to turn it back to its original blue color.
I'm seeing if the amount of time blowing into the solution affects the amount of NH3 drops needed to turn solution back blue. It seems that my results were consistent, and it took 2 drops of NH3 for all 3 different time trials.
Did I do this experiment wrong???
2 answers
thank you!!