IB Chemistry SL 2.4.3 Alloys Question Bank
Practise IB Chemistry SL 2.4.3 by explaining how alloying changes lattice structure, hardness and other physical properties.
- Syllabus
- First assessment 2025
- Course
- Chemistry SL
- Level
- SL
Exam points
- Explain how atoms of different size disrupt a metal lattice and restrict layer movement.
- Link alloy composition to increased hardness, strength or another changed property.
- Evaluate whether an alloy is suitable for a named use using its altered physical properties.
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.
titanium atoms/ions distort the regular arrangement of atoms/ions OR titanium atoms/ions are a different size to aluminium «atoms/ions» prevent layers sliding over each other
Marking guidance:
Accept diagram showing different sizes of atoms/ions.
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