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Black Precipitate Formation in Analysis by Sherwin Ordinaria is a document available to read on EtoBox.
This document describes the process for analyzing Group III anions using precipitation reactions with cadmium acetate. The three anions - sulfide, ferrocyanide, and ferricyanide - form insoluble cadmium salts with distinct colors. The precipitate is tested separately with confirmatory reagents to identify each anion. Hydrochloric acid dissolves the cadmium sulfide to detect hydrogen sulfide gas, and dissolves the cadmium ferrocyanide and ferricyanide to detect the ions forming Prussian blue or Turnbull
- Author
- Sherwin Ordinaria
- Language
- EN