Zadanie 1a
Tin and iodine are elements, whereas tin(IV) iodide is a compound. Describe, with reference to these three substances, how an element differs from a compound.
Chemistry SL Paper 2, May 2025, TZ1
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 17 zadań z tego arkusza, razem 50 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Position in the bonding triangle (2), Half-equations and balancing redox equations (2), Catalysts and alternative reaction pathways (2).
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Dodaj cały arkusz do zestawuZadanie 1b
Outline why solid tin(IV) iodide is classified as a polar covalent compound. Use sections 9 and 17 of the data booklet.
Zadanie 1c
A student proposed that, because tin(IV) iodide might be ionic, electrolysing the molten compound with inert electrodes should regenerate tin and iodine. (i) Label the diagram of the electrolytic cell to show which electrode is the anode and which is the…
- Materiał graficzny
Zadanie 2a
Deduce the electron configuration of the Fe3+ ion.
Zadanie 2b
When potassium thiocyanate solution is added to a pale yellow solution containing iron(III) ions, the following equilibrium is established. [Fe(H2O)6]3+(aq) + SCN−(aq) ⇌ [Fe(SCN)(H2O)5]2+(aq) + H2O(l) [Fe(H2O)6]3+(aq) is pale yellow and…
- Materiał graficzny
Zadanie 3a
Write an equation for the reaction, including state symbols.
Zadanie 3b
Deduce which reactant is limiting. Use sections 1, 4 and 7 of the data booklet.
Zadanie 3c
Calculate the volume, in dm3 at STP, of the gas produced. Use section 2 of the data booklet.
Zadanie 3d
The rate of the reaction can be followed by measuring the volume of carbon dioxide collected as time passes. The graph shows the results obtained at 20 °C. Sketch, on the same axes, the curve you would expect if the experiment were repeated with the acid at a…
- Materiał graficzny
Zadanie 4a
In the first step, manganese(III) ions formed from the manganate(VII) are complexed by ethanedioate ions. [Mn(H2O)6]3+(aq) + 2 C2O42−(aq) → [Mn(C2O4)2(H2O)2]−(aq) + 4 H2O(l) (i) Adding a small amount of manganese(II) sulfate, MnSO4(s), at the…
Zadanie 4b
Both ionic and covalent bonding are present in sodium ethanedioate, Na2C2O4. (i) Describe the two types of bonding. Ionic bonding: Covalent bonding: (ii) Deduce a Lewis formula of the ethanedioate ion, C2O42−. (iii) State the geometry of the…
Zadanie 5a
When 3.71 g of Z was burned completely in excess oxygen, 8.81 g of carbon dioxide and 4.51 g of water were collected. Determine the empirical formula of Z. Use sections 1 and 7 of the data booklet.
Zadanie 5b
A second sample of Z was converted completely into vapour at a known temperature and pressure. (i) 0.148 g of the vapour occupied 63.7 cm3 at 110 °C and a pressure of 1.00 × 105 Pa. Calculate the amount, in mol, of Z in this sample. Use…
Zadanie 6a
The displayed formula below shows part of the chain of an addition polymer. (i) Deduce the structural formula of the monomer used to build this polymer. (ii) Describe one chemical property responsible for this type of polymer being a useful material.
- Materiał graficzny
Zadanie 6b
The compound X shown below occurs naturally in cocoa and coffee and is used as a flavouring agent. (i) State the name of the functional group found in compound X. (ii) Deduce the IUPAC name of X. (iii) Draw a structural isomer of X taken from a different…
- Materiał graficzny
Zadanie 6c
But-2-ene and other alkenes serve as starting materials for a wide range of compounds. (i) Predict the product formed when but-2-ene reacts with bromine. (ii) Outline why but-2-ene, unlike butane, readily undergoes this type of reaction. (iii) State the…
- Tabela do uzupełnienia
Zadanie 6d
Propene reacts with bromine to produce 1,2-dibromopropane. CH3CH=CH2(g) + Br2(g) → CH3CHBrCH2Br(g) Calculate the enthalpy, in kJ, of the reaction using section 12 of the data booklet.