The student has provided a focused and detailed description of the main topic, clearly explaining the investigation of how varying pH of Cu(II) aqueous solution affects the percentage removal of Cu2+ ions via orange peels. The research question is appropriately focused, encompassing the range of the studied independent variable and the methodology of the experiment. The background information is relevant and well-organized, providing a good explanation of the key concepts necessary for understanding the investigation. Additionally, the chemistry of the experiment is very clearly explained, and the methodology is highly appropriate and focused on answering the research question. The student also demonstrates full awareness of safety hazards, ethical concerns, and environmental issues that can arise during the experiment.
