The student clearly stated the independent variable as brewing time and the dependent variable as gallic acid concentration in their research question, demonstrating a solid understanding of the relationship between these variables. The methodology was well articulated, including a detailed description of the acid-base titration process and the rationale for its selection. The student effectively addressed controlled variables, safety, ethical, and environmental issues associated with the investigation, ensuring a comprehensive approach. However, there was a lack of clarity regarding the measurement techniques for brewing time, which needed further explanation. Overall, the student provided a thorough and reproducible methodology, free from irrelevant information.
