Zadanie 4d
Ethane, C2H6, reacts with chlorine, Cl2, to produce chloroethane, C2H5Cl. Deduce the initiation step and two propagation steps for the mechanism of this reaction.
Radicals and unpaired electrons
Define a radical as a species with an unpaired electron, represent radicals with a dot such as Cl• and •CH3, explain why they are highly reactive, and recognise that a radical may be an atom, a molecule, a cation or an anion.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2023–2026.
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Zadanie 29
Which species is formed when a chlorine molecule undergoes homolytic fission in the presence of ultraviolet radiation? A. A chlorine radical, Cl ⋅ B. A chloride ion, Cl− C. A chlorine cation, Cl+ D. An excited chlorine molecule, Cl2 ⋅
Zadanie 5a
(i) Write an equation for the homolytic fission of a bromine molecule under UV light, using curly arrows to show the movement of electrons. (ii) Under different conditions a bromine molecule can undergo heterolytic fission. Write an equation for this process,…
Zadanie 24
Which species attacks a molecule of ethane in the first propagation step of its reaction with chlorine in ultraviolet light? A. chlorine atom, Cl ⋅ B. chlorine molecule, Cl2 C. chloride ion, Cl− D. hydrogen chloride molecule, HCl
Zadanie 24
Ethane and chlorine are exposed to ultraviolet light. Which species will most readily react with an ethane molecule? A. Cl2 molecule B. Cl− ion C. Cl ⋅ atom D. H+ ion