The student presents a focused and detailed description of the main topic, providing a clear explanation of the investigation into the effect of increasing ionic radii of central metal ions on the energy difference in the d-orbital splitting of color complexes. The background information is relevant and well-organized, offering a comprehensive understanding of the key concepts necessary for the experiment. Additionally, the methodology is highly appropriate to the topic, focusing on answering the research question by identifying the independent and dependent variables. The student also includes appropriate steps to assure the relevancy and validity of the obtained results, demonstrating a thorough understanding of the experimental process. However, there is no mention of the student's awareness of safety hazards, ethical concerns, or environmental issues that can arise during the experiment.