Zadanie 29
Wzorowane na: Chemistry HL Paper 1, May 2023, TZ1, pytanie 29. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Which row describes an electrolytic cell?
A. The anode is positive; the overall reaction is non-spontaneous
B. The anode is negative; the overall reaction is spontaneous
C. The anode is negative; the overall reaction is non-spontaneous
D. The anode is positive; the overall reaction is spontaneous
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
A ✔
«an electrolytic cell converts electrical energy to chemical energy, so the overall reaction is non-spontaneous and driven by an external supply; the anode (where oxidation occurs) is connected to the positive terminal and is positive. In a voltaic cell the anode is negative and the reaction is spontaneous»
Schemat punktowania
One mark for the correct option.