Zadanie 10a
Wzorowane na: Chemistry HL Paper 3, November 2023, TZ1, pytanie 10(a). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Methyl orange is a synthetic dye that is used as an acid–base indicator.
The absorption spectrum of methyl orange in acidic solution is shown.
Identify the colour of the acidic solution and give a reason. Use section 15 of the data booklet.
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
red ✔
the wavelength of maximum absorbance is about 505 nm/the solution absorbs green light AND the colour observed is complementary to the colour absorbed ✔
Schemat punktowania
M1: red. M2: a reason that names the wavelength of maximum absorbance (accept 495–520 nm) or the colour absorbed (green) AND states that the colour seen is the complementary colour. ECF for M2 from a wavelength that was read wrongly from the graph.