Zadanie 6
Wzorowane na: Chemistry HL Paper 1, November 2022, pytanie 6. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
An aqueous solution of copper(II) sulfate is blue because of the [Cu(H2O)6]2+ ion. Use section 15 of the data booklet if needed. Which statement best explains the colour?
A. Blue light is absorbed when electrons are promoted between split d orbitals
B. Orange light is absorbed when electrons are promoted between split d orbitals
C. Blue light is emitted when electrons return to lower d orbitals
D. Orange light is emitted when electrons return to lower d orbitals
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
B ✔
«the d sublevel is split by the ligands and the complex absorbs light whose energy matches the gap, here orange; the transmitted light is the complementary colour, blue. Complexes absorb rather than emit light, and the colour seen is not the colour absorbed»
Schemat punktowania
One mark for the correct option.