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QH H30+ heat Choose one or more: M Use IR; the product has a strong broad peak at 3200-3400 cm-1, but the starting material does not. Use IR; the starting material has a strong broad peak at 3200-3400 cm-1, but the product does not. O IR will not be useful as no detectable change in the spectrum will| OCcur. O Use IR; the product has a sharp narrow peak at 3100 cm-1, but the starting material does not. Use IR; the starting material has a sharp narrow peak at 3100 cm-1, but the product does not. Use UV-vis; the product would show an absorbance at a shorter Amax from that of the starting material. Use UV-vis; the product would show an absorbance at a longer Amax from that of the starting material. O UV-vis will not be useful as no change in Amax Would occur.

QH H30+ heat Choose one or more: M Use IR; the product has a strong broad peak at 3200-3400 cm-1, but the starting material does not. Use IR; the starting material has a strong broad peak at 3200-3400 cm-1, but the product does not. O IR will not be useful as no detectable change in the spectrum will| OCcur. O Use IR; the product has a sharp narrow peak at 3100 cm-1, but the starting material does not. Use IR; the starting material has a sharp narrow peak at 3100 cm-1, but the product does not. Use UV-vis; the product would show an absorbance at a shorter Amax from that of the starting material. Use UV-vis; the product would show an absorbance at a longer Amax from that of the starting material. O UV-vis will not be useful as no change in Amax Would occur.

Chemistry
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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How could spectroscopy be used to support that the below reaction occurred? Choose all that apply.

**Description:** This diagram shows a chemical reaction where the starting material is a phenol (a benzene ring with an OH group) reacting with hydronium ion (H₃O⁺) under heat to form benzene. **Options to Choose from:** 1. **Use IR; the product has a strong broad peak at 3200–3400 cm⁻¹, but the starting material does not.** - *Selected* 2. Use IR; the starting material has a strong broad peak at 3200–3400 cm⁻¹, but the product does not. 3. IR will not be useful as no detectable change in the spectrum will occur. 4. Use IR; the product has a sharp narrow peak at 3100 cm⁻¹, but the starting material does not. 5. Use IR; the starting material has a sharp narrow peak at 3100 cm⁻¹, but the product does not. 6. Use UV-vis; the product would show an absorbance at a shorter λmax from that of the starting material. 7. Use UV-vis; the product would show an absorbance at a longer λmax from that of the starting material. 8. UV-vis will not be useful as no change in λmax would occur. **Explanation:** - The IR (infrared) spectrum option selected indicates that the product (benzene) will have a broad peak in the range of 3200–3400 cm⁻¹. This typically corresponds to the O-H stretch seen in alcohols, which the starting material contains but not the product. - The given options explore the possible spectroscopic changes one might observe in the reaction, focusing on changes in IR and UV-vis spectra. The selected option indicates a significant change in the IR spectrum from reactant to product.
Transcribed Image Text:**Description:** This diagram shows a chemical reaction where the starting material is a phenol (a benzene ring with an OH group) reacting with hydronium ion (H₃O⁺) under heat to form benzene. **Options to Choose from:** 1. **Use IR; the product has a strong broad peak at 3200–3400 cm⁻¹, but the starting material does not.** - *Selected* 2. Use IR; the starting material has a strong broad peak at 3200–3400 cm⁻¹, but the product does not. 3. IR will not be useful as no detectable change in the spectrum will occur. 4. Use IR; the product has a sharp narrow peak at 3100 cm⁻¹, but the starting material does not. 5. Use IR; the starting material has a sharp narrow peak at 3100 cm⁻¹, but the product does not. 6. Use UV-vis; the product would show an absorbance at a shorter λmax from that of the starting material. 7. Use UV-vis; the product would show an absorbance at a longer λmax from that of the starting material. 8. UV-vis will not be useful as no change in λmax would occur. **Explanation:** - The IR (infrared) spectrum option selected indicates that the product (benzene) will have a broad peak in the range of 3200–3400 cm⁻¹. This typically corresponds to the O-H stretch seen in alcohols, which the starting material contains but not the product. - The given options explore the possible spectroscopic changes one might observe in the reaction, focusing on changes in IR and UV-vis spectra. The selected option indicates a significant change in the IR spectrum from reactant to product.
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