Chemistry 9701,52 Oct Nov 2024 | Cambridge AS - A Level Past Papers With Mark Scheme

1. Titration & Solution Preparation | Calculation of sodium carbonate mass for solution preparation, stepwise procedure for making standard solutions, and pipette rinsing techniques.

2. Acid-Base Titration Analysis | Endpoint detection using methyl orange, reasons for indirect heating of evaporating basins, and complete evaporation verification for residue analysis.

3. Burette Reading & Percentage Error Calculation | Determination of titration volume from burette readings, percentage error computation, and accuracy assessment in volumetric analysis.

4. Quantitative Chemical Analysis | Calculation of sodium chloride amount from titration results, concentration determination for hydrochloric acid and sodium carbonate solutions.

5. Thermal Decomposition & Mass Change Experiment | Heating metal with sulfur, fume hood necessity, importance of excess sulfur, and graph plotting for mass relationship evaluation.

6. Data Interpretation & Experimental Accuracy | Identifying anomalous data, gradient determination for mass relationships, evaluating experimental reliability, and validating theoretical predictions for metal sulfide formation.