Chemistry 5070/32 Oct Nov 2024 | Cambridge O-Level Past Papers With Mark Scheme

1. Titration of Sodium Carbonate with Hydrochloric Acid | Conducting titration experiments, selecting best results, calculating acid volume, determining moles and concentration, mass of sodium carbonate.

2. Qualitative Analysis of Solutions | Flame tests for metal cations, identification of nitrate anion using aluminum and sodium hydroxide, reactions with sodium hydroxide and ammonia.

3. Determination of Zinc in Muntz Metal | Planning an investigation using sulfuric acid reaction, measuring evolved gas or mass loss, ensuring accuracy, and calculating zinc percentage.

4. Chemical Identification Tests | Systematic testing of anions, cations, and gases, including flame tests, precipitation reactions, and gas evolution tests with observations.

5. Experimental Techniques & Accuracy | Proper swirling in titration, dropwise acid addition, safety precautions in gas identification, and controlling experimental variables.