QUALITATIVE ANALYSIS OF GROUP I CATIONS this purpose, metal cations are broadly classified into three groups...

 

 

 

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QUALITATIVE ANALYSIS OF GROUP I CATIONS this purpose, metal cations are broadly classified into three groups based upon their solubilities. The group I cations, Pb2+, Ag+, and Hg22+, are those which form insoluble chlorides. Group II cations, Cu2+, Bi2+, Hg2+, Cd2+, Sn4+, and Sb2+ form insoluble sulfides below pH 0.5 while group III cations, Al3+, Cr3+, Co3+, Fe2+, Mn2+, Ni3+, and Zn2+, form insoluble sulfides above pH9. Finally, the group IV cations, Ba 2+, Ca2+, Mg2+, Na+, K+, and NH4+, are the remaining common cations. The alkaline earth members of this group form insoluble carbonates while the alkaline elements are identified by flame tests. The ammonium ion is detected by a litmus test. These groups are easily separated by their markedly different solubilities. Separating the cations within a given group is more difficult but based upon the same principle, as will be shown in the experimental section. NOTE: THE GROUPS USED FOR QUANTITATIVE ANALYSIS ARE SOLELY BASED ON SOLUBILITY. THEY DO NOT IN ANY WAY CORRESPOND TO THE GROUPS OF THE PERIODIC TABLE. GROUP I CASTIONS: Pb2+, Ag+, Hg22+ a) Describe a procedure you would use to determine that the unknown solution contains Ag+ and Pb2+. b) Draw a flow chart for the determination of Ag+ and Pb2+. QUALITATIVE ANALYSIS OF GROUP I CATIONS this purpose, metal cations are broadly classified into three groups based upon their solubilities. The group I cations, Pb2+, Ag+, and Hg22+, are those which form insoluble chlorides. Group II cations, Cu2+, Bi2+, Hg2+, Cd2+, Sn4+, and Sb2+ form insoluble sulfides below pH 0.5 while group III cations, Al3+, Cr3+, Co3+, Fe2+, Mn2+, Ni3+, and Zn2+, form insoluble sulfides above pH9. Finally, the group IV cations, Ba 2+, Ca2+, Mg2+, Na+, K+, and NH4+, are the remaining common cations. The alkaline earth members of this group form insoluble carbonates while the alkaline elements are identified by flame tests. The ammonium ion is detected by a litmus test. These groups are easily separated by their markedly different solubilities. Separating the cations within a given group is more difficult but based upon the same principle, as will be shown in the experimental section. NOTE: THE GROUPS USED FOR QUANTITATIVE ANALYSIS ARE SOLELY BASED ON SOLUBILITY. THEY DO NOT IN ANY WAY CORRESPOND TO THE GROUPS OF THE PERIODIC TABLE. GROUP I CASTIONS: Pb2+, Ag+, Hg22+ a) Describe a procedure you would use to determine that the unknown solution contains Ag+ and Pb2+. b) Draw a flow chart for the determination of Ag+ and Pb2+.

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As we know Ag and Pb groupI cations along are with Hgz 2 Propenty of ... View the full answer