The student provides a focused and detailed description of the main topic, clearly stating and explaining the topic in the body of the Background information. However, there is no comment provided for the subcriterion of a focused and detailed description of the research question. The background information provided by the student is relevant and focused, with a good explanation of key concepts necessary for understanding the investigation. The chemistry is explained well enough for the reader to fully and easily understand it without the need for rereading, although the student could have discussed some aspects in greater detail. The methodology of the investigation is highly appropriate to the topic, using spectrophotometry to find out the concentration of CoCl4 and the equilibrium constant at different temperatures. The methodology is also focused on answering the research question, correctly identifying the independent and dependent variables. Additionally, the methodology includes appropriate steps to assure the relevancy and validity of the obtained results, with a clear list of controlled variables. The student shows full awareness of safety hazards, ethical concerns, and environmental issues that can arise during the experiment.
