The student clearly describes how the data was obtained and processed, making each procedural step easily understood. The methodology is detailed, including the preparation of lead (II) nitrate solutions and the measurement of oxygen production, with qualitative observations enhancing the investigation. Data recording and processing are precise, with appropriately annotated tables and correct usage of units, decimal places, and significant figures. The student effectively considers the impact of uncertainties on the results, showcasing calculations for mean, standard deviation, and cumulative uncertainty. Overall, the work is systematic and supports valid conclusions through robust statistical analyses, accurately addressing the research question.
