Testing for Oxidising & Reducing Agents

Chemistry: Cambridge International GCSE Supplement, topic 6.4.6

Testing for Oxidising and Reducing Agents

We can test for oxidising and reducing agents using the following methods:

Aqueous potassium manganate(VII)

Aqueous potassium manganate(VII)

  • Tests for reducing agents.
  • When a reducing agent is added, the aqueous potassium manganate(VII) turns from purple → colourless.
Aqueous potassium iodide

Aqueous potassium iodide

  • Tests for oxidising agents.
  • When an oxidising agent is added, the aqueous potassium iodide turns from colourless → brown.

Test yourself on Testing for Oxidising & Reducing Agents

  • Which of these is used to test for reducing agents?

  • Which of these is used to test for oxidising agents?

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