Zadanie 5d
Wzorowane na: Chemistry HL Paper 2, November 2023, TZ1, pytanie 5(d). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Informacja do zadań 5a-5h.
Aluminium has a low density, which is why it is widely used in aircraft and in specialized alloys.
Polecenie
In the gas phase, some AlCl3 molecules join in pairs to form this dimer:
(i) Identify the hybridization of the aluminium atom in the dimer, Al2Cl6.
(ii) Describe, in terms of Lewis acids and bases, how two AlCl3 molecules bond together to form the dimer.
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) sp3 ✔
«four electron domains / four σ bonds around each aluminium atom»
(ii) a chlorine atom «of one molecule» acts as a Lewis base, donating a lone pair AND the aluminium atom «of the other molecule» acts as a Lewis acid, accepting it «forming a coordination bond» ✔
Schemat punktowania
(i) [1]; sp3 may be written with the 3 as a subscript or in normal type. (ii) [1] for both the Lewis base and the Lewis acid correctly assigned.