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When an excess of potassium iodide reacts with copper sulfate solution, followed by the addition of sodium thiosulfate, which statement about the reaction is false?
- Sodium thiosulfate undergoes oxidation.
- Copper(II) iodide is produced.
- Copper(I) iodide is formed.
- The iodine released is reduced.
Correct answer: Copper(II) iodide is produced.
Solution
Copper(II) iodide is not produced in the reaction between potassium iodide and copper sulfate solution, followed by the addition of sodium thiosulfate, because the actual product formed is copper(I) iodide due to the specific reaction conditions.
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