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???
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.
thank you!!
Based on the information you provided, it appears that your experimental procedure was conducted correctly. The consistency in the amount of NH3 drops needed to turn the solution back to its original blue color suggests that the duration of blowing into the solution did not significantly affect the outcome.
To confirm whether you conducted the experiment correctly, here are a few aspects to consider:
1. Experimental setup: Make sure you used the same concentration of Bromothymol blue solution and NH3 drops for all trials. Ensure that the solution was mixed thoroughly before each trial.
2. Control variables: Keep in mind that you should have controlled other factors that could influence the results. For example, maintain a constant room temperature and ensure consistent volume of CO2 expelled during each trial.
3. Replication: Conducting multiple trials helps ensure the reliability of your results. You mentioned that you performed three different time trials, which is a good practice.
4. Data recording: Record your observations accurately, including the time it took to blow into the solution and the number of NH3 drops required for each trial.
Overall, if you followed these steps and obtained consistent results, it indicates that the duration of blowing into the solution did not significantly affect the amount of NH3 drops needed to turn the solution back to blue. However, it is always a good idea to discuss your experiment and results with a teacher or mentor for confirmation and suggestions for improvement.