The student stated the independent variable, which was the ionic charge of the cation in nitrate salts, and the dependent variable, the enthalpy of solution, within the research question. The student effectively described the calorimetric method for measuring enthalpy. A comprehensive background theory was provided, linking ionic charge to the enthalpy of solution, demonstrating a solid understanding of relevant chemistry concepts. However, the student failed to adequately explain the techniques used for measuring the variables and did not address safety, ethical, or environmental issues related to the investigation. Overall, the methodology was described in sufficient detail, allowing for reproducibility without unnecessary repetition.
