Absorption Spectrum Practice problem

In summary, an absorption spectrum is a graphical representation of how a substance absorbs electromagnetic radiation at different wavelengths. It is important to practice absorption spectrum problems in order to improve skills in data interpretation and problem solving, and to understand how different substances absorb light for analysis. An absorption spectrum is interpreted by analyzing the peaks and valleys on the graph, taking into account factors such as chemical composition, concentration, and temperature. It differs from an emission spectrum, which shows the wavelengths of light emitted by a substance and is used to identify elements present.
  • #1
Sulfone
1
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Moved from a technical forum, so homework template missing
Summary: The experimentally measured absorption spectrum of 1,3-pentadiene molecule exhibits a
peak absorption (light absorption) around 224 nm corresponding to an electronic
transition. Estimate the length of the molecule.

I thought of using lambert law A = c*l*e but we have none. how do I solve this
 
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  • #2
This has nothing to do with Lambert's law. What else have you seen that could link the absorption wavelength to the size of the molecule?
 

1. What is an absorption spectrum?

An absorption spectrum is a graph that shows the wavelengths of light that are absorbed by a substance. It is used to identify the chemical composition of a substance and can provide information about its structure and properties.

2. How do you interpret an absorption spectrum?

An absorption spectrum is interpreted by observing the peaks and valleys of the graph. The peaks represent the wavelengths of light that are absorbed by the substance, while the valleys represent the wavelengths that are not absorbed. By comparing the peaks to known standards, the chemical composition of the substance can be determined.

3. Why is it important to practice interpreting absorption spectra?

Practicing interpreting absorption spectra is important because it helps scientists develop their skills in identifying and analyzing chemical substances. It also allows for the identification of unknown substances, which can be crucial in fields such as forensics and pharmaceuticals.

4. What are some common methods for creating absorption spectra?

Some common methods for creating absorption spectra include infrared spectroscopy, ultraviolet-visible spectroscopy, and nuclear magnetic resonance spectroscopy. Each method uses different types of radiation to interact with the substance and produce a spectrum.

5. Can absorption spectra be used to determine the concentration of a substance?

Yes, absorption spectra can be used to determine the concentration of a substance. The height of the peaks on the spectrum can be correlated to the amount of substance present, allowing for quantitative analysis. This is commonly used in fields such as environmental science and biochemistry.

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