In a balanced chemical equation, what is conserved?

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Prepare for the WJEC GCSE Chemistry Exam with multiple choice questions and detailed explanations. Enhance your knowledge and boost your confidence. Get exam-ready today!

Multiple Choice

In a balanced chemical equation, what is conserved?

Explanation:
In balancing a chemical equation, you’re testing how quantities are conserved during a reaction. Mass is conserved because atoms are just rearranged, not created or destroyed, so the total number of each type of atom on the left equals the total on the right. Charge is conserved because electrons aren’t created or destroyed in ordinary chemical changes, so the total electrical charge must be the same on both sides. Temperature isn’t a conserved quantity in a reaction; it can change as heat is absorbed or released.

In balancing a chemical equation, you’re testing how quantities are conserved during a reaction. Mass is conserved because atoms are just rearranged, not created or destroyed, so the total number of each type of atom on the left equals the total on the right. Charge is conserved because electrons aren’t created or destroyed in ordinary chemical changes, so the total electrical charge must be the same on both sides. Temperature isn’t a conserved quantity in a reaction; it can change as heat is absorbed or released.

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