IB Chemistry SL 2.4.3 Alloys

Practise explaining how mixing a metal with other elements changes lattice regularity and material properties. Different-sized particles hinder layer movement, often increasing…

Syllabus
First assessment 2025
Objective
2.4.3
Level
SL

Exam points

  • explain reduced malleability through different-sized particles obstructing layer sliding
  • compare an alloy with its pure metal using strength, hardness or conductivity evidence
  • distinguish a metal-containing alloy from a two-phase composite by structure

2.4.3—Alloys question 1

[Maximum number: 2]

Titanium is a transition metal.

Explain why an aluminium-titanium alloy is harder than pure aluminium.

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