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CHEM 1&2 Lab Manual & worksheets pg 195

CHEM 1&2 Lab Manual & worksheets pg 195 -...

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Experiment 19: Qualitative Analysis General Chemistry I and II Lab Manual Dakota State University page 195 of 232 soluble) from other ions in the solution. Separation of Group I from Groups II through V To one milliliter of your solution, add dilute HCl dropwise until no more precipitate seems to form. Do not add the HCl too quickly, since excess chloride ions can cause the silver to re-dissolve. Centrifuge and decant; keep both the solid (which contains group I ions) and the decantate (which contains groups II through IV ions). Add one drop of HCl to the decantate to verify that no more precipitate forms; if precipitate does form, repeat this separation step. Separation of Ag + from Pb +2 The solubility of lead (II) chloride increases with temperature, while silver chloride remains insoluble. Add one milliliter of distilled water; heat the solution in a hot water bath, but do not allow the solution to come to a boil. Decant the solution hot (you will not be able to centrifuge). Repeat this step one more time.
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