Complete the balanced equation for this reaction. CuCO₃ + __________ → __________ + CO₂ + H₂O Calculate the relative formula mass of copper carbonate, CuCO₃. (relative atomic masses: C = 12.0, O = 16.0, Cu = 63.5) State two observations that would show the reaction has finished.

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Complete the balanced equation for this reaction - Edexcel - GCSE Chemistry - Question 3 - 2020 - Paper 1

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Complete the balanced equation for this reaction. CuCO₃ + __________ → __________ + CO₂ + H₂O Calculate the relative formula mass of copper carbonate, CuCO₃. (rela... show full transcript

Worked Solution & Example Answer:Complete the balanced equation for this reaction - Edexcel - GCSE Chemistry - Question 3 - 2020 - Paper 1

Step 1

Complete the balanced equation for this reaction.

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Answer

The balanced equation for the reaction of copper carbonate with sulfuric acid is:

$\text{CuCO}_3 + \text{H}_2\text{SO}_4 → \text{CuSO}_4 + \text{CO}_2 + \text{H}_2\text{O}$

Step 2

Calculate the relative formula mass of copper carbonate, CuCO₃.

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Answer

To calculate the relative formula mass of copper carbonate (CuCO₃), we use the atomic masses provided:

Copper (Cu) = 63.5
Carbon (C) = 12.0
Oxygen (O) = 16.0

The formula mass is:

$63.5 + 12.0 + 3(16.0) = 63.5 + 12.0 + 48.0 = 123.5$

Step 3

State two observations that would show the reaction has finished.

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Answer

The evolution of gas (carbon dioxide) has ceased.
No further effervescence or bubbling is observed.

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