Chemistry 9701/53 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Solubility trends of chlorine gas in water influenced by temperature, analyzed through Le Chatelier's principle and equilibrium concepts.
2. Experimental setup for determining chlorine concentration in a saturated aqueous solution via redox titration with sodium thiosulfate and potassium iodide.
3. Hazard assessment and precautionary measures during experiments involving chlorine and iodine compounds, ensuring safety and accurate handling of chemicals.
4. Hydrated salt analysis for determining the formula of FeSO₄·xH₂O by calculating moles of anhydrous salt and water using mass loss data.
5. Graphical analysis of experimental results, plotting moles of FeSO₄ against moles of water to deduce hydration number with slope calculation.
6. Error analysis and anomaly identification in experimental data, providing justifications for outliers and evaluating data reliability for hydration studies.