Page 1: Laboratory Techniques and Chemical Analysis

This comprehensive page covers three main Chemistry paper 2 required practical tasks AQA: reaction rates, water purification, and analytical techniques.

The reaction rates section examines the reaction between magnesium carbonate and sulfuric acid, focusing on how concentration affects reaction speed.

Definition: Rate of reaction measures how quickly reactants are converted into products.

Example: The reaction MgCO3 (s) + H₂SO4 (aq) → MgSO4 (aq) + CO₂(g) + H₂O demonstrates how concentration affects reaction speed.

The water purification section explores various testing and treatment methods for different water sources.

Vocabulary: Desalination refers to the process of removing salt from seawater to make it suitable for drinking.

The chromatography section details the separation of ink components.

Highlight: Rf values are calculated to identify different components in a mixture based on how far they travel up chromatography paper.

The qualitative analysis section (Triple Science only) covers various tests for identifying unknown compounds.

Example: Flame tests produce characteristic colors: sodium produces yellow, while potassium produces lilac.

Vocabulary: Qualitative analysis involves identifying the presence of specific ions through chemical tests.

The practical work emphasizes proper laboratory techniques, safety considerations, and the importance of controlling variables for accurate results.