How are Group I cations separated in qualitative analysis, given they do not precipitate with H₂S in an acidic medium?
University of Ilorin CHM108 2025 past question
- Precipitation as chlorides using dilute HCl
- Precipitation as sulfides using H₂S
- Precipitation as hydroxides using NH₄OH
- Precipitation as carbonates using (NH₄)₂CO₃
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