What experimental technique should you use to determine the concentration of a colored solution? O measurements of volume & mass O calorimetry O spectrometry O titration
What experimental technique should you use to determine the concentration of a colored solution? O measurements of volume & mass O calorimetry O spectrometry O titration
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:**Determining the Concentration of a Colored Solution**
### Question:
What experimental technique should you use to determine the concentration of a colored solution?
### Answer Choices:
- **Measurements of volume & mass**
- **Calorimetry**
- **Spectrometry**
- **Titration**
### Explanation:
When seeking to determine the concentration of a colored solution, spectrometry is often the preferred method, particularly **UV-Vis spectrophotometry**. This technique measures the absorbance or transmittance of light by the solution at specific wavelengths, which correlates with the concentration of the colored compound according to Beer-Lambert Law.
**Details:**
1. **Measurements of volume & mass:** While useful in some contexts, this approach is not specific to determining the concentration of colored solutions.
2. **Calorimetry:** This method measures the heat change in chemical processes and is typically used for studying reaction energies, not directly for concentration.
3. **Spectrometry:** By passing light through the solution and measuring the absorbance at particular wavelengths, you can determine the concentration of the solute based on its characteristic absorption.
4. **Titration:** This is generally used to determine the concentration of solutions through chemical reactions, often involving color changes, but is more commonly applied to colorless solutions or at the endpoint of a titration process.
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