Collectively, these elements are called the halogens and are in the next-to-last column on the periodic table (see Figure 4.1 “Halogens on the Periodic Table”). This is most easily demonstrated with fluorine, chlorine, bromine, and iodine. Not all proposed single-replacement reactions will occur between two given reactants. A typical characteristic of a single-replacement reaction is that there is one element as a reactant and another element as a product. Here the negatively charged ion changes from chloride to fluoride. Another example of a single-replacement reaction is The hydrogen atoms in HCl are replaced by Zn atoms, and in the process a new element-hydrogen-is formed. Is an example of a single-replacement reaction. Here we will begin our study of certain types of chemical reactions that allow us to predict what the products of the reaction will be.Ī single-replacement reaction is a chemical reaction in which one element is substituted for another element in a compound, generating a new element and a new compound as products. Up to now, we have presented chemical reactions as a topic, but we have not discussed how the products of a chemical reaction can be predicted. Use the periodic table, an activity series, or solubility rules to predict whether single-replacement reactions or double-replacement reactions will occur.Recognize chemical reactions as single-replacement reactions and double-replacement reactions.
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