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**Exercise in Analytical Chemistry: Interpretation of Ion Presence** --- **2. Analysis of Filtrate and Its Impact on Ion Determination** In performing an unknown analysis, a student did a sloppy separation of solid PbSO₄ from the filtrate, leaving some unwanted Pb⁺² ions in the solution. What effect may this have on the determination of the following ions? Answer with either **"no effect"** or **"false positive"**. A false positive indicates the student might think the ions are present when, in fact, they are not. - a. Pb⁺² ____________________________________ - b. Ag⁺¹ ____________________________________ - c. Zn⁺² ____________________________________ - d. Fe⁺³ ____________________________________ --- **Instruction Notes for Educators:** - **Objective:** This exercise aims to reinforce student understanding of the consequences of improper separation techniques on analytical results. - **Discussion Points:** - Discuss the common sources of errors in ion separation and identification. - Emphasize the importance of precision and accuracy in analytical procedures. **Possible Student Answers:** - a. Pb⁺² __no effect__ - b. Ag⁺¹ __false positive__ - c. Zn⁺² __no effect__ - d. Fe⁺³ __no effect__ **Explanation of Graphs/Diagrams:** - No graphs or diagrams are presented in this exercise. --- This exercise encourages critical thinking and understanding of the practical aspects of analytical chemistry, specifically dealing with ion separation and detection errors.

**Exercise in Analytical Chemistry: Interpretation of Ion Presence** --- **2. Analysis of Filtrate and Its Impact on Ion Determination** In performing an unknown analysis, a student did a sloppy separation of solid PbSO₄ from the filtrate, leaving some unwanted Pb⁺² ions in the solution. What effect may this have on the determination of the following ions? Answer with either **"no effect"** or **"false positive"**. A false positive indicates the student might think the ions are present when, in fact, they are not. - a. Pb⁺² ____________________________________ - b. Ag⁺¹ ____________________________________ - c. Zn⁺² ____________________________________ - d. Fe⁺³ ____________________________________ --- **Instruction Notes for Educators:** - **Objective:** This exercise aims to reinforce student understanding of the consequences of improper separation techniques on analytical results. - **Discussion Points:** - Discuss the common sources of errors in ion separation and identification. - Emphasize the importance of precision and accuracy in analytical procedures. **Possible Student Answers:** - a. Pb⁺² __no effect__ - b. Ag⁺¹ __false positive__ - c. Zn⁺² __no effect__ - d. Fe⁺³ __no effect__ **Explanation of Graphs/Diagrams:** - No graphs or diagrams are presented in this exercise. --- This exercise encourages critical thinking and understanding of the practical aspects of analytical chemistry, specifically dealing with ion separation and detection errors.

Chemistry
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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**Exercise in Analytical Chemistry: Interpretation of Ion Presence** --- **2. Analysis of Filtrate and Its Impact on Ion Determination** In performing an unknown analysis, a student did a sloppy separation of solid PbSO₄ from the filtrate, leaving some unwanted Pb⁺² ions in the solution. What effect may this have on the determination of the following ions? Answer with either **"no effect"** or **"false positive"**. A false positive indicates the student might think the ions are present when, in fact, they are not. - a. Pb⁺² ____________________________________ - b. Ag⁺¹ ____________________________________ - c. Zn⁺² ____________________________________ - d. Fe⁺³ ____________________________________ --- **Instruction Notes for Educators:** - **Objective:** This exercise aims to reinforce student understanding of the consequences of improper separation techniques on analytical results. - **Discussion Points:** - Discuss the common sources of errors in ion separation and identification. - Emphasize the importance of precision and accuracy in analytical procedures. **Possible Student Answers:** - a. Pb⁺² __no effect__ - b. Ag⁺¹ __false positive__ - c. Zn⁺² __no effect__ - d. Fe⁺³ __no effect__ **Explanation of Graphs/Diagrams:** - No graphs or diagrams are presented in this exercise. --- This exercise encourages critical thinking and understanding of the practical aspects of analytical chemistry, specifically dealing with ion separation and detection errors.
Transcribed Image Text:**Exercise in Analytical Chemistry: Interpretation of Ion Presence** --- **2. Analysis of Filtrate and Its Impact on Ion Determination** In performing an unknown analysis, a student did a sloppy separation of solid PbSO₄ from the filtrate, leaving some unwanted Pb⁺² ions in the solution. What effect may this have on the determination of the following ions? Answer with either **"no effect"** or **"false positive"**. A false positive indicates the student might think the ions are present when, in fact, they are not. - a. Pb⁺² ____________________________________ - b. Ag⁺¹ ____________________________________ - c. Zn⁺² ____________________________________ - d. Fe⁺³ ____________________________________ --- **Instruction Notes for Educators:** - **Objective:** This exercise aims to reinforce student understanding of the consequences of improper separation techniques on analytical results. - **Discussion Points:** - Discuss the common sources of errors in ion separation and identification. - Emphasize the importance of precision and accuracy in analytical procedures. **Possible Student Answers:** - a. Pb⁺² __no effect__ - b. Ag⁺¹ __false positive__ - c. Zn⁺² __no effect__ - d. Fe⁺³ __no effect__ **Explanation of Graphs/Diagrams:** - No graphs or diagrams are presented in this exercise. --- This exercise encourages critical thinking and understanding of the practical aspects of analytical chemistry, specifically dealing with ion separation and detection errors.
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