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C D www.saplinglearning.com/ibiscrms/mod/ biswewphp?id-2446295 Apps Bookmarks D Northwest Nazarene 3/29/2016 11:55 PM25/100 D canvas N Netflix GMailSgn n to your Gradebook 6 of 8 Map Ans A it on ennt ning a mitre of metal ations was reated with diute HC and·propiat onmed The solution was filtered and HS was bubbled through the acidic soluion. A precipitabe again formed and was fitered off. Then, the pht was raised to about 8 and HS was again bubbiled tvough the soktion This sme no precipitate formed. Finally, the solution was treated with a formation of a precbtan. Which metal ions were defintoly present, which were definiely absenkt, and which may or may not have been present in the originsi mixture? sodium carbonale solution, which resuted in Definitely present Defintely absent Possibly presere A solution co as follows.?Explanation / Answer
In cation group separation table, I group cations Pb2+, Ag+ and Hg2^2+ and these can be precipitated with dil. HCl
fromation of precipitate with dil. HCl indicates the presence of either Pb2+, Ag+ and Hg2^2+
Group II contains Cu2+, Cd2+ and Hg2+ and these can be precipitated as sulfides
Formation of precipitate with H2S gas indicates the presence of Cd2+ and Hg2+
Group V cations i.e., Ca2+, Ba2+, Sr2+ can be separated as Carbonates
Formation of precipitate with NaHCO3 indicates the presence of Ca2+
Group III&IV cations (Al3+, Fe2+, Ni2+, Zn2+) can be precipitated as hydroxides with NaOH
Since there is no precipitate formation Al3+, Fe2+, Ni2+, Zn2+ are absent
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