Conservation of mass and balanced chemical equations (5.3.1.1) | AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Foundation | KnowledgeSet

Conservation of mass and balanced chemical equations

Chemistry (Combined Science) · GCSE · AQA · AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Foundation · Specification point · 5.3.1.1 · Quantitative chemistry · Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

Balanced chemical equations

Conservation of mass in chemical reactions

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5.3.1.1 Conservation of mass and balanced chemical equations

Content	Key opportunities for skills development
$The law of conservation of mass states that no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants. This means that chemical reactions can be represented by symbol equations which are balanced in terms of the numbers of atoms of each element involved on both sides of the equation. Students should understand the use of the multipliers in equations in normal script before a formula and in subscript within a formula.$	$WS 1.2$

Content

Key opportunities for skills development

The law of conservation of mass states that no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants. This means that chemical reactions can be represented by symbol equations which are balanced in terms of the numbers of atoms of each element involved on both sides of the equation. Students should understand the use of the multipliers in equations in normal script before a formula and in subscript within a formula.

WS 1.2