The word equation for the reaction between copper carbonate and dilute sulfuric acid is copper carbonate + sulfuric acid → copper + carbon dioxide + water (i) Complete the balanced equation for this reaction. CuCO₃ + __________ → __________ + CO₂ + H₂O (ii) Calculate the relative formula mass of copper carbonate, CuCO₃. (relative atomic masses: C = 12.0, O = 16.0, Cu = 63.5) (iii) What is the chemical test to show that a gas is carbon dioxide? A bubble the gas through limewater, limewater turns cloudy B put damp blue litmus paper in the gas, litmus paper turns red C put a lighted splint into the gas, the splint is extinguished D measure the pH of the gas, pH = 4

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The word equation for the reaction between copper carbonate and dilute sulfuric acid is copper carbonate + sulfuric acid → copper + carbon dioxide + water (i) Complete the balanced equation for this reaction - Edexcel - GCSE Chemistry: Combined Science - Question 3 - 2020 - Paper 1

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The word equation for the reaction between copper carbonate and dilute sulfuric acid is copper carbonate + sulfuric acid → copper + carbon dioxide + water (i) Comp... show full transcript

Worked Solution & Example Answer:The word equation for the reaction between copper carbonate and dilute sulfuric acid is copper carbonate + sulfuric acid → copper + carbon dioxide + water (i) Complete the balanced equation for this reaction - Edexcel - GCSE Chemistry: Combined Science - Question 3 - 2020 - Paper 1

Step 1

Complete the balanced equation for this reaction.

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Answer

The correctly balanced equation for the reaction is:

$CuCO₃ + H₂SO₄ → CuSO₄ + CO₂ + H₂O$

This equation shows copper carbonate reacting with sulfuric acid to produce copper sulfate, carbon dioxide, and water.

Step 2

Calculate the relative formula mass of copper carbonate, CuCO₃.

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Answer

To find the relative formula mass of copper carbonate (CuCO₃), we sum the atomic masses of its constituent elements:

Copper (Cu): 63.5
Carbon (C): 12.0
Oxygen (O): 16.0 (there are 3 oxygen atoms)

Thus, the calculation is:

$\text{Relative formula mass} = 63.5 + 12.0 + (3 \times 16.0)$ $= 63.5 + 12.0 + 48.0$ $= 123.5$

Therefore, the relative formula mass of CuCO₃ is 123.5.

Step 3

What is the chemical test to show that a gas is carbon dioxide?

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Answer

The correct answer is:

A. bubble the gas through limewater, limewater turns cloudy.

This is a well-known test for carbon dioxide, as it forms calcium carbonate, which is insoluble and causes the limewater to turn cloudy.

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