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Science Bowl Question

📅 MIT Science Bowl Invitational 2020🎓 HS🔄 Round 12#️⃣ Question 12🌟 BONUS✍️ Short Answer

Researchers in the Dinca group at MIT have discovered that copper-exchanged zeolites can catalyze partial oxidation of methane to methanol. A spectroscopic technique used to characterize the copper zeolite is x-ray absorption spectroscopy. By name or number, identify all of the following three statements which are true about x-ray absorption spectroscopy: 1) X-ray near-edge absorption spectroscopy measures energies of electronic transitions. 2) For a set of complexes of a given metal, a higher oxidation state of the metal will correspond to an edge of higher energy. 3) Compared to the corresponding tetrahedral complex, transition metal octahedral complexes will have have a larger K-edge, where the K-edge corresponds to a 1s to valence d-orbital absorption.

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