The five metals in the following list are given in the order in which they occur in the electrochemical series:
sodium, aluminium, zinc, iron, gold - Leaving Cert Chemistry - Question Question 1 - 2017
Question Question 1
The five metals in the following list are given in the order in which they occur in the electrochemical series:
sodium, aluminium, zinc, iron, gold.
(i) Suggest a r... show full transcript
Worked Solution & Example Answer:The five metals in the following list are given in the order in which they occur in the electrochemical series:
sodium, aluminium, zinc, iron, gold - Leaving Cert Chemistry - Question Question 1 - 2017
Step 1
Suggest a reason why gold is used in jewellery more commonly than the other metals.
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Answer
Gold is often used in jewellery because it is the least reactive of the metals listed, meaning it does not corrode or tarnish easily. This property allows gold to maintain its luster and appearance over time, making it an ideal choice for decorative items. Additionally, gold is highly malleable and can be easily shaped into intricate designs.
Step 2
Which one of these metals corrodes most readily?
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Answer
The metal that corrodes most readily among the listed options is sodium. Due to its high reactivity, sodium reacts quickly with moisture in the air and other substances, leading to rapid corrosion.
Step 3
How is this metal stored in the school laboratory?
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Answer
Sodium is typically stored in oil (paraffin) to prevent it from reacting with air or moisture, which can cause it to corrode and possibly ignite.
Step 4
What name is usually given to the corrosion of iron?
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Answer
The corrosion of iron is commonly referred to as rusting. Rust is formed when iron reacts with oxygen and moisture in the environment.
Step 5
Which of the metals listed above is M?
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Answer
The metal M used in hot-dip galvanising to coat iron is zinc. Zinc protects iron from corrosion by providing a protective layer.
Step 6
Why is the recycling of aluminium strongly recommended?
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Answer
Recycling of aluminium is highly recommended because it is very costly to produce from its ores. The process consumes a lot of electricity and has a significant environmental impact. Additionally, recycling helps to preserve valuable resources and reduces the energy consumption associated with producing new aluminium from raw materials.
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