Drinks are often sold in cans - Edexcel - GCSE Chemistry - Question 4 - 2013 - Paper 1
Question 4
Drinks are often sold in cans.
These cans are made either of aluminium or of steel coated with tin.
The table gives information about these three metallic substances... show full transcript
Worked Solution & Example Answer:Drinks are often sold in cans - Edexcel - GCSE Chemistry - Question 4 - 2013 - Paper 1
Step 1
reason 1
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Answer
Tin is more expensive to extract and recycle compared to aluminium or steel. This makes recycling tin a more financially beneficial choice.
Step 2
reason 2
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Answer
The amount of tin available in the Earth's crust is significantly smaller than that of aluminium or steel, making it more critical to recycle tin to conserve this resource.
Step 3
(b) Complete the sentence
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Answer
The correct answer is C reduction, as the extraction of aluminium typically involves the reduction process.
Step 4
(c)(i) Explain what you understand by the term alloy
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Answer
An alloy is a mixture of two or more metals, which results in a material with enhanced properties compared to the individual metals. This combination changes the physical and chemical characteristics.
Step 5
(c)(ii) Explain, in terms of their structures, why magnalium is stronger than pure aluminium
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Answer
In pure aluminium, the atoms are uniform in size, allowing them to slide over each other easily. However, in magnalium, the presence of magnesium atoms, which are larger, disrupts the arrangement and movement of the aluminium atoms. This hinders the layers from slipping past each other, resulting in increased strength and stability of the material.
