Chemical Reactions
chapter 9: Chemical reactions
Chemical reactions are represented by balanced chemical equations. On the left side of the equation are the reactants and on the right side are the products. These reactants and products are written using the symbolic nomenclature for the chemicals involved. There are five types of chemical reactions in total. A synthesis reaction occurs when two reactants combine to form a single product, while a decomposition reaction occurs when a single reactant decomposes to form two products. A combustion reaction occurs when a reactant burns in air, which is to say it reacts with oxygen, and forms a product. There are two types of replacement reactions: single replacement and double replacement. Single replacement reactions occur when an ionic compound reactants with a metallic element, which results in a new ionic compound including the metallic reactant and another metallic element being left as a pure substance. Double-replacement reactions occur between substances in aqueous solutions and produce precipitates, water, or gases.
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