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What does chemically pure mean?

What does chemically pure mean?

A pure substance is a single element or a single compound, with nothing else mixed in. A mixture contains two or more substances that are not chemically bonded together.

2.1 Purity and separating mixtures Lesson

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

Step-by-step lessons on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

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