Question

the role of Name Lab Section 1 2 3 4 Prelab: Inorganic Group I lons 1. On the report sheet, complete the flow diagram for the separation and identification of the ions in Group I. 2. Write balanced net ionic equations for the following reactions: a. The precipitation of the chloride of Pb in Step 1. b. The formation of a yellow precipitate in Step 4. C. The formation of a complex ion in Sep 5. d. The reaction that for a white precipitate in Step 5. 3. A solution may contain Ag.P . and Ba?. A white precipitate forms on addition of 6 M HCL and is separated from the solution. When 1 M sodium sulfate is added to this first solution, no precipitate forms. The precipitate from the HCl addition is partially soluble in hot water, the residus dissolves on addition of 6 MINH, Which of the ions are present and which are absent? State your reasoning. (In "paper" unknowns such as this one, confirmatory tests are often omitted. The partial solubility of the precipitate in hot water implies that one of the ions is present, and so we report it present) Present Absent

please complete the flow diagram (only question number 1)

Answer 1

thanks

Date Page: 2 Thank you very much. ANALysis of Group I (Ag+, Har Pot) Take about 2 me original solution add 5-10 drops of dil HCl, Centrifuge the solution Heat Centrifuge PbCI, Residue Hgcha and Agci 1 Shake it well with 5 ml of HNO3 and Centrifuge Q divided into two purts 2 chots of K2 (704 - yellow pet I Port +2 chots of kI - Yellow Pet Lead/ Centrifuge Ag (NH3)2CL Add few drops of dil UNO 3 Kesidue Hg (NH₂) (1 - Black dissolve the residue in aqua – regia and add 2 drops of Shel white ppt (Silver? white ppt Smercury 2