The student clearly stated the independent variable, which was the concentration of copper(II) ions in a CuSO₄(aq) solution, and the dependent variable, the potential difference of the Daniell cell, establishing their relationship effectively. The research question and method of analysis were well articulated, detailing how different concentrations affected the potential difference, with measurements taken using a digital voltmeter. The background theory was comprehensive and directly relevant to the investigation, demonstrating the student's understanding of key electrochemical principles. However, the student did not sufficiently explain the choice of techniques for measuring the variables, nor did they justify the absence of ethical considerations associated with the experiment. Nonetheless, they addressed safety and environmental issues appropriately, and the methodology was described in sufficient detail to allow reproducibility.
