Some students investigated the thermal decomposition of metal carbonates - AQA - GCSE Chemistry Combined Science - Question 3 - 2020 - Paper 1
Question 3
Some students investigated the thermal decomposition of metal carbonates.
The word equation for the reaction is:
metal carbonate → metal oxide + carbon dioxide
Th... show full transcript
Worked Solution & Example Answer:Some students investigated the thermal decomposition of metal carbonates - AQA - GCSE Chemistry Combined Science - Question 3 - 2020 - Paper 1
Step 1
Weigh test tube
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Answer
Start by weighing the empty test tube to obtain its initial mass.
Step 2
Add metal carbonate
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Add a known mass of copper carbonate to the test tube.
Step 3
Heat
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Heat the test tube containing the copper carbonate for a specified period, as recorded in Table 1.
Step 4
Allow to cool
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After heating, allow the test tube and its contents to cool down to room temperature.
Step 5
Weigh test tube and metal oxide
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Once cooled, weigh the test tube again, including the remaining metal oxide.
Step 6
Determine mass of carbon dioxide produced
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Calculate the mass of carbon dioxide produced by subtracting the mass of the metal oxide and test tube from the initial mass of the test tube with copper carbonate.
Step 7
Repeat with different metal carbonates
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Repeat the entire procedure with different metal carbonates to compare the mass of carbon dioxide produced.
