2. A gas chromatogram of a four-(4)-component mixture had the following areas and retention times (RT). Component (RT) Area (min) (mm²) 2.564 2341 5.241 1278 1.904 4302 3.217 1987 A. Which compound do you suspect is the most volatile? Why? B D R Calculate the percent composition of component D.
2. A gas chromatogram of a four-(4)-component mixture had the following areas and retention times (RT). Component (RT) Area (min) (mm²) 2.564 2341 5.241 1278 1.904 4302 3.217 1987 A. Which compound do you suspect is the most volatile? Why? B D R Calculate the percent composition of component D.
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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Transcribed Image Text:**Gas Chromatography Analysis of a Four-Component Mixture**
This example illustrates a gas chromatogram of a mixture with four components, showcasing their respective areas and retention times (RT).
| Component | RT (min) | Area (mm²) |
|-----------|----------|------------|
| A | 2.564 | 2341 |
| B | 5.241 | 1278 |
| C | 1.904 | 4302 |
| D | 3.217 | 1987 |
**Questions for Analysis:**
A. Which compound do you suspect is the most volatile? Why?
B. Calculate the percent composition of component D.
**Explanation:**
- **Retention Time (RT):** The time taken for a compound to travel through the chromatography column to the detector. Lower RT suggests higher volatility.
- **Area under Peak:** Proportional to the concentration of the compound in the mixture.
**Steps:**
1. **Identify Volatility:**
- The compound with the shortest RT is typically the most volatile.
2. **Percent Composition Calculation:**
- Use the area of each compound to determine the percent composition.
This exercise helps in understanding compound behavior in gas chromatography, focusing on volatility and compositional analysis.
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