Group I Cations A1. Explain why litmus paper is used in step 4. Why is blue litmus paper used rather than redlitmus paper? Group I Cationsof 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two dropsof 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete,centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, andrepeat the procedure until no precipitate forms. Discard the supernatant into the appropriatewaste container or keep for later experiments if your instructor so indicates.Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge,and discard the water to the appropriate waste container. Repeat the wash procedure. Thesolid contains Pb2*, Ag*, and/or Hg22*.Step 2. Separation of Pb2*.Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid.Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present.Step 3. Testing for Pb2*.Add 2 or 3 drops of 0.2 M K2CRO4 solution to the combined supernatant from step 2. Formationof a yellow solid (PbCrO4) indicates the presence of Pb2*.Step 4. Separation of and testing for Hg,2* and Ag*.To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solidindicates the presence of Hg2* in the original solution.Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paperturns red. A white precipitate indicates the presence of Ag*.

In this question, we have to find out the correct answer of given problem by the help of the…

Step 4. Separation of and testing for Hg,2* and Ag*. To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solid indicates the presence of Hg22* in the original solution. Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paper turns red. A white precipitate indicates the presence of Ag*.

Step 4. Separation of and testing for Hg,2* and Ag. To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solid indicates the presence of Hg22 in the original solution. Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paper turns red. A white precipitate indicates the presence of Ag*.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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