OCR GCSE Chemistry B · J258
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: SamplingChemists cannot usually test every part of a large batch of material, a mineral deposit or a body of water. Instead, they take a sample and carry out tests on that smaller portion. In qualitative analysis, the question is which substances are present?
- Revise: Qualitative vs quantitative analysis
A limited quantity of material taken for analysis and intended to represent the larger body of material.