You are provided with an unknown solution that contains Group I cations. To 1 mL of this solution you add 6M HCl and obtain a white precipitate. You centrifuge the solution and add an additional drop of 6 M HCI to insure that precipitation is complete. No additional cloudiness formed upon the addition of one drop of HCl and the supernatant solution was decanted and discarded. After washing the precipitate, centrifuging, and discarding the wash, 1-2 mL of water is added to the precipitate, the mixture is heated in a boiling water bath for a few minutes with stirring. The hot mixture is centrifuged and the supernatant transferred to a clean test tube. No solid remained in the original test tube. One drop of 6M acetic acid is added to the test tube containing the solution, the mixture is stirred, followed by the addition of a few drops of 1 M K½CrO4 solution. The formation of a yellow precipitate was observed. Based on the observations and information provided, identify the ion(s) present in your unknown solution. Pb2+ O Ag* Hg2*

You are provided with an unknown solution that contains Group I cations. To 1 mL of this solution you add 6M HCl and obtain a white precipitate. You centrifuge the solution and add an additional drop of 6 M HCI to insure that precipitation is complete. No additional cloudiness formed upon the addition of one drop of HCl and the supernatant solution was decanted and discarded. After washing the precipitate, centrifuging, and discarding the wash, 1-2 mL of water is added to the precipitate, the mixture is heated in a boiling water bath for a few minutes with stirring. The hot mixture is centrifuged and the supernatant transferred to a clean test tube. No solid remained in the original test tube. One drop of 6M acetic acid is added to the test tube containing the solution, the mixture is stirred, followed by the addition of a few drops of 1 M K½CrO4 solution. The formation of a yellow precipitate was observed. Based on the observations and information provided, identify the ion(s) present in your unknown solution. Pb2+ O Ag* Hg2*

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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