Chemistry 0620/52 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Reaction Rate Investigation | Effect of sodium thiosulfate concentration on reaction speed, graphical analysis, impact of stirring on uniform reaction progression.

2. Measurement Accuracy | Use of burette over measuring cylinder, limitations of volumetric pipettes, methods for improving reliability of experimental data.

3. Qualitative Analysis of Solids | Flame test for metal ions, precipitation tests with sodium hydroxide and silver nitrate, gas evolution with acids.

4. Identification of Ions | Recognition of carbonate, sulfate, and transition metal ions through characteristic reactions, confirmation via solubility patterns.

5. Comparison of Citric Acid Concentrations | Titration of lime and lemon juice with sodium hydroxide, determination of higher citric acid concentration through volume required for neutralization.

6. Exothermic vs. Endothermic Reactions | Additional temperature measurements to classify the reaction type, role of heat change in reaction characterization.