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Hydrogen and oxygen: choose the correct splint

Hydrogen and oxygen: choose the correct splint

To identify a gas, state both the test and the positive observation. Hydrogen gives a squeaky pop when a lit splint is held at the mouth of a test tube containing it; a metal reacting with dilute acid suggests hydrogen. The pop comes from hydrogen reacting rapidly with oxygen in the air to form water:

4.2 Identifying the products of chemical reactions Lesson

  1. GCSE
  2. /Chemistry
  3. /4.2 Identifying the products of chemical reactions

Step-by-step lessons on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. 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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