![]() So this is a composition reaction.Ī decomposition reaction starts from a single substance and produces more than one substance that is, it decomposes. Although there are two molecules of water being produced, there is only one substance-water-as a product. Water is produced from hydrogen and oxygen. There may be a coefficient other than one for the substance, but if the reaction has only a single substance as a product, it can be called a composition reaction. A single substance as a product is the key characteristic of the composition reaction. ![]() Predicting the products in some of them may be difficult, but the reactions are still easy to recognize.Ī composition reaction (sometimes also called a combination reaction or a synthesis reaction) produces a single substance from multiple reactants. Three classifications of chemical reactions will be reviewed in this section. Predict the products of a combustion reaction.Recognize composition, decomposition, and combustion reactions.
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