OCR GCSE Chemistry A · J248
Specification PAG 2, PAG 6 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Qualitative Analysis: Identification of Ions and GasesOCR includes the use of qualitative reagents and techniques to analyse unknown samples or products among its practical requirements. This work can include gas tests, flame tests and precipitation reactions. In an investigation, several tests may be combined to identify both ions in an unknown ionic compound or to identify products formed by a reaction.
- Revise: Qualitative Analysis and pH Measurement
A chemical added to a sample to produce an observable reaction that helps identify a substance.