nessler's reagent

Question

Nessler's reagent is used to detect:

RankGuru · Accepted Answer

**Nessler's Reagent** is an alkaline solution of **Potassium tetraiodomercurate(II)** ($K_2[HgI_4]$).
- It is used as a highly sensitive test for **Ammonia ($NH_3$)** or **Ammonium ions ($NH_4^+$)**.
- **Reaction**: Ammonia reacts with the reagent to produce a **brown-colored precipitate** of **Iodide of Millon's base** ($NH_2-Hg-O-Hg-I$).
- This test is so sensitive that it can detect even trace amounts of ammonia in drinking water.

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nessler's reagent

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