From models to materials

Chemia IBPaper 2, maj 2026, TZ1wzorowane5 pktotwarteśrednie (szac.)

Zadanie 3c

Pentan-2-ol can form by reacting pent-1-ene with water in the presence of an acid catalyst. CH₂=CHCH₂CH₂CH₃(g) + H₂O(l) → CH₃CH(OH)CH₂CH₂CH₃(aq) ΔH^⊖ = −84 kJ mol⁻¹ (i) Explain why increasing the temperature would increase…

Chemia IBPaper 2, maj 2026, TZ2wzorowane3 pktotwartełatwe (szac.)

Zadanie 3b

An alloy of magnesium and aluminium is used for car wheels and laptop casings. (i) Suggest why adding aluminium produces a material that is harder and less malleable than magnesium alone. (ii) Suggest why a magnesium alloy is a good choice for the casing of a…

Chemia IBPaper 2, maj 2026, TZ3wzorowane2 pktotwartełatwe (szac.)

Zadanie 3c

Steel is an alloy of iron with a small percentage of carbon. (i) Outline one reason why steel is harder than pure iron. (ii) State one property of iron, other than hardness, that can be modified by forming an alloy.

Chemia IBPaper 1A, maj 2026, TZ3wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 10

A section of the chain of an addition polymer is drawn below. From which monomer is this polymer made? A. CH₂=CHCH₂CH₃ B. CH₃CH₂CH₂CH₃ C. CH₃CH=CHCH₃ D. (CH₃)₂C=CH₂

• Materiał graficzny

Chemia IBPaper 2, maj 2025, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 1b

Outline why solid tin(IV) iodide is classified as a polar covalent compound. Use sections 9 and 17 of the data booklet.

Chemia IBPaper 2, maj 2025, TZ1wzorowane5 pktotwarteśrednie (szac.)

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

Chemia IBPaper 2, maj 2025, TZ1wzorowane2 pktotwartełatwe (szac.)

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

Chemia IBPaper 1A, maj 2025, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 10

Which monomer produces this addition polymer? A. CH₂=CHCH₂CH₃ B. CH₃CH=CHCH₃ C. CH₂=C(CH₃)₂ D. CH₂=CHCH=CH₂

• Materiał graficzny

Chemia IBPaper 1A, maj 2025, TZ3wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 10

Which monomer could produce this polymer? A. CH₂ClCH₂Cl B. CHCl₂CH₃ C. CH₂=CHCl D. CH₂=CCl₂

• Materiał graficzny

Chemia IBPaper 2, listopad 2025, TZ1wzorowane9 pktobliczenioweśrednie (szac.)

Zadanie 1b

4.81 g of sulfur was heated in a stream of chlorine gas until the reaction was complete. The mass of the chloride produced was 10.13 g. (i) Calculate how many atoms are present in this 4.81 g sample of sulfur. Use sections 2 and 7 of the data booklet. (ii)…