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Chemical Changes and Equations ActivityIntroduction:A chemical changeis one in which a new substance is formed. It involves a changein both the composition and the properties of the substances involved. To communicate what happens during a chemical change, the chemist writes a balanced equation. A chemical equation shows the formulas of the reactants(the substances that you start with) and of the products(the substances that are formed). Balanced means that the equation has the correct coefficients so that the same number of each type of atom are represented on both sides of the arrow. Example: When iron rusts in air, it combines with oxygen to form a new substance, iron oxide (or rust). We can represent this reaction with a word equation:Iron + Oxygen Iron oxideHowever, the chemist prefers a balanced chemical equation:4 Fe(s)+ 3O2(g)2Fe2O3(s)Procedure:Part 1: SynthesisEquipment: ring stand, ring, triangle, crucible tongs, Bunsen burner1.

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