The purpose of second experiment was to understand the chemical reactions involved in the separation and identification of the Group II cations, B i 3 ⁺ , Cd² , Cu² , SnC ⁺ ⁺ l 6 ² . The ⁻ regents that were used are, 0.1M of NH Cl, 0.5M of NH , 3.0 M of KOH, 1.0 M of ₄ ₃ Thioacetamide, 6M of HCl and 6M of HNO . Furthermore, the Group II cations were ₃ precipitated as chlorides, they were physically separated from the remaining mixture by centrifuging. The same protocols of group I cations was followed, except that the reagents and
Post Lab Question: Group I Cations: Questions (4). A Student mistakenly added (12M) HCl to a sample of unknown, instead of adding (6M) HCl, as directed. 1) At first, a large amount of light- colored precipitate formed, but some dissolved on further addition of concentrated HCl. Write an equation (s) for the reaction (s) that might have occurred. ⁻ ₂ ₂
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- Spring '16