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3 (a) (i) Name the type of reaction that happens when a metal carbonate is heated - AQA - GCSE Chemistry - Question 3 - 2016 - Paper 1
Question 3
3 (a) (i) Name the type of reaction that happens when a metal carbonate is heated. 3 (a) (ii) Which solid product is formed when copper carbonate is heated? Tick (... show full transcript
Worked Solution & Example Answer:3 (a) (i) Name the type of reaction that happens when a metal carbonate is heated - AQA - GCSE Chemistry - Question 3 - 2016 - Paper 1
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3 (b) (i) Explain the results for potassium carbonate.
Answer
The potassium carbonate did not decompose when heated, as the mass remained the same and the limewater did not turn cloudy. This indicates that no carbon dioxide was produced. The temperature may not have been high enough for thermal decomposition to occur.
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3 (b) (ii) Suggest how the reactivity series can be used to predict which metal carbonate reacts most easily when heated.
Answer
In the reactivity series, the more reactive metals will have carbonates that decompose more easily upon heating. Therefore, by comparing the positions of the metals within the reactivity series, one can predict that the less reactive metals will tend not to decompose easily when heated.
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3 (c) (iii) Give two reasons why iron produced in a blast furnace is converted into steel.
Answer
- Iron from the blast furnace is brittle and converting it into steel improves its strength and flexibility.
- Steel has specific attributes making it suitable for various construction and manufacturing applications.
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3 (c) (iv) Give three reasons why a steel car body should be recycled and not reused or sent to landfill.
Answer
- Recycling steel conserves natural resources and reduces the need for mining new iron ore.
- Recycling minimizes pollution and energy consumption compared to producing new steel.
- Using recycled materials reduces waste, as landfills can become overloaded with used products.