阿摩線上測驗
26. Which of the followings are Lewis acids?
(A)(1), (2)
(B)(2), (4), (5)
(C)(1), (4), (5)
(D)(4), (5), (6)
(E)(3), (4), (5)
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統計： A(2), B(0), C(2), D(2), E(13) #2275872
統計： A(2), B(0), C(2), D(2), E(13) #2275872
詳解 (共 1 筆)
艾爾
#4866519
The designation of MgBr2 is much less clear cut. In aqueous solution, magnesium bromide speciates to Mg2+ and Br− species, as the aquated ions:
MgBr2(s)→Mg2++2Br−
The magnesium ion is solvated by several water molecules, so that we could reasonably represent this as [Mg(OH2)6]2+. In other words, the magnesium cation has accepted electron density, i.e. donation, from the water ligands, and here has acted as a Lewis acid.
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