Zadanie 26
Wzorowane na: Chemistry SL Paper 1A, May 2026, TZ3, pytanie 26. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Both of the reactions below occur spontaneously at room temperature.
Zn(s) + Fe2+(aq) → Zn2+(aq) + Fe(s)
Fe(s) + Sn2+(aq) → Fe2+(aq) + Sn(s)
Which conclusion can be drawn about a voltaic cell built from the half-cells Sn(s) / Sn2+(aq) and Zn(s) / Zn2+(aq)?
A. The zinc half-cell is the anode, where zinc is oxidized
B. The tin half-cell is the anode, where tin is oxidized
C. The zinc half-cell is the cathode, where Zn2+ is reduced
D. The tin half-cell is the cathode, where Sn2+ is oxidized
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
A ✔
«zinc displaces iron and iron displaces tin, so zinc is the most easily oxidized metal of the three; in the cell zinc is oxidized at the anode and Sn2+ is reduced at the cathode»
Schemat punktowania
1 mark for the correct option.
Komentarz
The more reactive metal is oxidized and forms the anode of the cell.