Two students heat some calcium carbonate, CaCO3.
Look at the equation for the reaction.
CaCO3 (s) → CaO (s) + CO2 (g)
Calcium carbonate → Calcium oxide + carbon dioxide
What is the meaning of (s) in the equation?
Look at their results.
Mass of calcium carbonate |
Mass of calcium oxide |
Mass of carbon dioxide |
1.00 | 0.56 | 0.44 |
2.00 | 1.12 | 0.88 |
3.00 | 1.68 | 1.32 |
4.00 | 2.24 | ..................................... |
Complete the table.
Student A states:
‘If I heat 20 g of calcium carbonate, I will make 8.8 g of calcium oxide and 11.2 g of carbon dioxide.’
Is student A correct?
Explain your answer.
Student B investigates another reaction.
Look at the equations.
Answer = ...................................... [1]
[2]
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