Zadanie 38
Wzorowane na: Chemistry HL Paper 1A, May 2026, TZ3, pytanie 38. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
In the nitration of benzene, the electrophile NO2+ is produced by the reaction of concentrated nitric acid with concentrated sulfuric acid.
HNO3 + 2 H2SO4 → NO2+ + H3O+ + 2 HSO4−
Which statement describes the role of sulfuric acid in this reaction?
A. It acts as a Brønsted-Lowry acid
B. It acts as a Brønsted-Lowry base
C. It acts as a nucleophile that attacks the benzene ring
D. It acts as the electrophile
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
A ✔
«sulfuric acid donates a proton to nitric acid, so it behaves as a Brønsted-Lowry acid; the protonated nitric acid then loses water to form NO2+»
Schemat punktowania
1 mark for the correct option.
Komentarz
In this mixture nitric acid is the weaker acid and accepts a proton, behaving as a Brønsted-Lowry base.