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.
T... 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
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Begin by weighing the empty test tube to obtain its initial mass.
Step 2
Add metal carbonate
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Add a known mass of copper carbonate into the test tube and record the new mass.
Step 3
Heat
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Heat the test tube containing copper carbonate for a specified time while monitoring the reaction.
Step 4
Allow to cool
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
After heating, allow the test tube and its contents to cool before measuring again.
Step 5
Weigh test tube and metal oxide
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Once cooled, weigh the test tube along with the produced metal oxide to determine the final mass.
Step 6
Determine mass of carbon dioxide produced
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Calculate the change in mass, which corresponds to the mass of carbon dioxide released during the reaction.
Step 7
Repeat with different metal carbonates
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To strengthen the investigation, the experiment should be repeated using different metal carbonates, following the same steps.
