Zadanie 3c
Wzorowane na: Chemistry HL Paper 3, May 2023, 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
Poly(chloroethene) is made from the monomer CH2=CHCl by addition polymerization. Nylon-6,6 is made from the monomers H2N(CH2)6NH2 and HOOC(CH2)4COOH by condensation polymerization.
Distinguish between these two types of polymerization by describing the monomers used and the products formed in each.
Monomers:
Products:
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
Monomers:
addition: monomers are unsaturated/contain a C=C bond ✔
condensation: monomers have two reactive functional groups «each» ✔
Products:
addition: the polymer is the only product/no by-product AND condensation: the polymer and a small molecule «such as water» are formed ✔
Schemat punktowania
M1: type of monomer in addition polymerization; the double bond must be stated as a bond between carbon atoms. M2: functional groups in condensation monomers. M3: both product statements are needed; accept H2O or HCl eliminated in condensation.