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Question
What is Nessler’s reagent ?
Solution
- Nessler's reagent is a solution of mercury(II) iodide (HgI2) in potassium iodide (KI) and potassium hydroxide (KOH) named after the German chemist Julius Nessler
- Nessler’s reagent is an alkaline solution of K2 HgI4
- It is used in testing for ammonia, with which it forms a brown coloration or precipitate.
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