The student provides a focused and detailed description of the main topic, clearly stating and explaining the topic at the beginning of the investigation. The research question is also present, although no comment is provided. The background information provided by the student is relevant and focused, giving a good explanation of the key concepts necessary for understanding the investigation. The chemistry is well explained, making it easy for the reader to understand without the need for rereading. The methodology of the investigation is highly appropriate to the topic, using back titration to answer the research question. The student also demonstrates full awareness of safety hazards, ethical concerns, and environmental issues that can arise during the experiment.