Explain that the mass of the products equals the mass of the reactants in a chemical reaction.

In the subtopic Conservation of mass and balanced chemical equations, this learning objective focuses on explain that the mass of the products equals the mass of the reactants in a chemical reaction. It sits within Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations for AQA GCSE Chemistry 8462 Unit 4.3, so the explanation must stay anchored to quantitative chemistry rather than drifting into a general chemistry idea. Approved keywords to use include reactant, product. Product. means a substance that is formed as a result of a chemical reaction Avoid the mistake of students often think that the mass of products can differ from the mass of reactants in a chemical reaction; instead, emphasize that according to the law of conservation of mass, the total mass of reactants must equal the total mass of products in a closed system For exam answers, always remember that in a chemical reaction, the mass of the products must equal the mass of the reactants. Use balanced equations to verify this