Chemistry · Chemical principles involved in the qualitative salt analysis Anions: CO3(2-), S2-, SO4(2-), NO3-, NO2-, Cl-, Br-, I- (Insoluble salts excluded)
The ion or group detected by \) is:
The ion or group detected by \( \boldsymbol{K}_{2}\left[\boldsymbol{H} \boldsymbol{g} \boldsymbol{I}_{4}\right] \) is:
- A. NO
- B. \( C l \)
- C. \( N H^{-2} \)
- D. \( N H_{3} \)
Step-by-step solution
K2[HgI4] is Nessler's reagent, used specifically for the detection of ammonia (NH3) or ammonium ions. It forms a brown precipitate or coloration due to the formation of HgNH2I or similar complexes. Therefore, the ion or group detected is NH3.
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