IB Chemistry SL 2.4.3 Alloys Questions
Use real exam questions to define alloys, explain lattice distortion and select alloys for a named application.
- Syllabus
- First assessment 2025
- Course
- Chemistry SL
- Level
- SL
Exam points
- Define an alloy and distinguish it from a composite using composition, homogeneity and structure evidence.
- Explain how different-sized atoms distort a metallic lattice, restrict layer slip and increase hardness, strength or rigidity.
- Relate alloy composition to changed conductivity, malleability, ductility or corrosion resistance and judge suitability for a named use.
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IB Chemistry SL 2.4.3 Alloys Questions 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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