Zadanie 3c
Wzorowane na: Chemistry HL Paper 3, May 2024, TZ1, pytanie 3(c). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Sodium metal is manufactured by the electrolysis of molten sodium chloride.
(i) Outline why sodium can be produced by electrolysis rather than by reduction with carbon.
(ii) State the half-equation for the formation of sodium during the electrolysis.
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) sodium is very reactive/very high in the reactivity series
OR
sodium is above carbon in the activity series, so its ions are not reduced by carbon in the extraction process ✔
(ii) Na+(l) + e− → Na(l) ✔
Schemat punktowania
(i) Do not accept "sodium is reactive" without a reference to how hard its ions are to reduce or to its position in the reactivity series. (ii) Ignore missing or incorrect state symbols; the electron must be on the left.