In UV-Vis spectroscopy, what does a shift in the absorption peak indicate?
Practice Questions
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Q1
In UV-Vis spectroscopy, what does a shift in the absorption peak indicate?
Change in concentration
Change in pH
Change in molecular structure
Change in temperature
A shift in the absorption peak in UV-Vis spectroscopy often indicates a change in molecular structure, such as the formation of new bonds or changes in electronic transitions.
Questions & Step-by-step Solutions
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Q
Q: In UV-Vis spectroscopy, what does a shift in the absorption peak indicate?
Solution: A shift in the absorption peak in UV-Vis spectroscopy often indicates a change in molecular structure, such as the formation of new bonds or changes in electronic transitions.
Steps: 5
Step 1: Understand what UV-Vis spectroscopy is. It is a technique used to measure how much light a substance absorbs in the ultraviolet and visible light spectrum.
Step 2: Learn about absorption peaks. An absorption peak is a specific wavelength where a substance absorbs light the most.
Step 3: Recognize what a shift means. A shift in the absorption peak means that the wavelength where the maximum absorption occurs has changed.
Step 4: Connect the shift to molecular structure. A shift often indicates that the molecular structure of the substance has changed, such as new bonds forming or changes in how electrons are arranged.
Step 5: Conclude that monitoring shifts in absorption peaks can help scientists understand chemical reactions or changes in materials.
