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
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**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.
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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