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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* Give a chemical equation that indicates how your acid (provide structure) was made soluble in water during the experiment.

Transcribed Image Text:**POST-LAB #3 Extraction**
**Objective:** Complete the extraction process, focusing on recovery percentages for both crude and recrystallized compounds. Attach this report to your data/observations and upload it to EduCAT.
1. **Unknown CODE:** _?_ (Code not provided)
2. **Mass of Unknown Used:** 1.015 g
---
**Neutral Compound:**
- **Amount of Crude Neutral:** 0.446 g
- **Total Amount Recovered:** 0.671 g
- **% Recovery Extraction:** 66%
- **Calculation:** (0.671 g / 1.015 g) x 100 = 66%
- **Mass of Recrystallized Neutral:** 0.31 g
- **% Recovery Recrystallization:** 69.5%
- **Calculation:** (0.31 g / 0.446 g) x 100 = 69.5%
- **Neutral Melting Point (m.p.):** 134-137 ºC
- **Literature Melting Point:** 136 ºC
- **Identity of Neutral:** 1,2,4,5-tetrachlorobenzene
---
**Acid Compound:**
- **Amount of Crude Acid:** 0.225 g
- **Mass of Recrystallized Acid:** 0.19 g
- **% Recovery Recrystallization:** 84%
- **Calculation:** (0.19 g / 0.225 g) x 100 = 84%
- **Acid Melting Point (m.p.):** 110-112.3 ºC
- **Literature Melting Point:** 111-113 ºC
- **Identity of Acid:** m-toluic acid
---
**Chemical Equation Requirement:**
Provide a chemical equation that illustrates how the acid structure was made soluble in water during the extraction process. The structure of m-toluic acid should be depicted.
**Chemical Structure of Acid:**
- The drawing indicates a carboxyl group (COOH) attached to a benzene ring with a methyl (CH₃) group.
**Note:** Ensure your chemical equation clearly represents solubilization during extraction.
**End of Post-Lab Report**
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