CH-1809
Oxidising and reducing agents
Chemistry · Secondary 4 · Medium · Oxidising and reducing agents
Separate samples of an unknown solution Z are added to aqueous potassium iodide and to acidified potassium manganate(VII).
Observations:
• Aqueous potassium iodide changes from colourless to brown.
• Acidified potassium manganate(VII) changes from purple to colourless.
What can be concluded about Z?
Observations:
• Aqueous potassium iodide changes from colourless to brown.
• Acidified potassium manganate(VII) changes from purple to colourless.
What can be concluded about Z?
- Z is both an oxidising agent and a reducing agent.
- Z is neither an oxidising agent nor a reducing agent.
- Z is only a reducing agent.
- Z is only an oxidising agent.
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