1. Titanium dioxide nanoparticles are used in some sunscreens - Edexcel - GCSE Chemistry - Question 1 - 2022 - Paper 1
Question 1
1. Titanium dioxide nanoparticles are used in some sunscreens.
(i) State one property of titanium dioxide nanoparticles that make them suitable for use in sunscreen... show full transcript
Worked Solution & Example Answer:1. Titanium dioxide nanoparticles are used in some sunscreens - Edexcel - GCSE Chemistry - Question 1 - 2022 - Paper 1
Step 1
State one property of titanium dioxide nanoparticles that make them suitable for use in sunscreens.
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Answer
Titanium dioxide nanoparticles are effective at absorbing UV radiation due to their physical properties, which help protect the skin from harmful UV rays.
Step 2
Suggest one possible risk associated with using nanoparticles.
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Answer
One possible risk associated with using nanoparticles is their unknown long-term effects on human health, which could include potential accumulation in the body or adverse environmental impacts.
Step 3
State the trend shown by the data in Figure 1.
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Answer
The trend shown in Figure 1 indicates that as the diameter of the nanoparticle increases, the surface area to volume ratio decreases, reflecting an inverse relationship between these two factors.
