During the thermal decomposition of copper(II) carbonate, which gas is released?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

During the thermal decomposition of copper(II) carbonate, which gas is released?

Explanation:
When a metal carbonate is heated, it often breaks down into a metal oxide and carbon dioxide. Copper(II) carbonate behaves this way, so it decomposes to copper(II) oxide (a solid) and carbon dioxide gas. The gas released in this reaction is carbon dioxide, which escapes as bubbles while the solid residue remains as copper(II) oxide. Other gases like oxygen or hydrogen aren’t produced in this decomposition, and carbon monoxide would only be formed under different conditions that don’t apply here.

When a metal carbonate is heated, it often breaks down into a metal oxide and carbon dioxide. Copper(II) carbonate behaves this way, so it decomposes to copper(II) oxide (a solid) and carbon dioxide gas. The gas released in this reaction is carbon dioxide, which escapes as bubbles while the solid residue remains as copper(II) oxide. Other gases like oxygen or hydrogen aren’t produced in this decomposition, and carbon monoxide would only be formed under different conditions that don’t apply here.

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