Discussion

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1. Experimental Results vs. Hypothesis & source of error

The experiment was successful in generating CO₂ bubbles, but the final beverage showed an alkaline mouthfeel, weak bubbles and a pH of 5.16-5.34, which was not in line with the expected balance of strong bubbles and acidity.The apparent CO₂ yield of 0.28g at first glance exceeded the prediction by 27%, but the error analysis revealed that:
0.06g of air was mixed in the balloon measurement;
Reaction humidity may have increased the effective mass of reactants;
Fluctuations in ambient temperature (±2°C) accelerated the reaction. After subtracting the air error, the actual yield of 0.22g was in agreement with the theoretical value, but the alkaline taste and weak bubbles indicated that the gas dissolution efficiency (not the amount generated) was the main limiting factor - the pressure in the 100mL bottle was not effective in maintaining the gas in the 25mL solution.

Key Conclusion:
Theoretical calculations need to be strictly matched to experimental conditions (e.g., vessel design, measurement methods), otherwise gas retention efficiency can significantly affect the results.

(Streamlined to core contradictions and sources of error, retaining logical chains and removing redundant expressions)

Suggested Improvements for Future Experiments

The following improvements are suggested to improve the accuracy of the experiment
Switch to gas syringe or drainage method to collect CO₂ to avoid mixing air impurities in the balloon method
Use desiccant to preserve the reactants to ensure accurate weighing.
Use small volume reaction bottles (e.g. 50mL bottle with 25mL solution) to minimize air residue.
Adopting pH meter instead of test paper to accurately detect changes in acidity.
4±0.5℃ low-temperature environment, with magnetic stirrer to maintain the uniformity of the reaction.
Nitrogen control group was set up to eliminate background interference
Repeat each group of experiments three times to take the average value