ich ionic compounds react with an element or another compund to form new ionic compounds. Here is an example of single-replacement when chlorine gas reacts with aqueous sodium bromide:Cl2(g) + 2NaBr(aq) 2NaCl(aq) + Br2(l)A double-replacement reaction between barium chloride and potassium carbonate looks like this:BaCl2(aq) + K2CO3(aq) 2KCl(aq) + BaCO3(s) An elimination reaction is a reaction in which a compound is broken into smaller parts when heated. Here is an example when the same substance is heated and goes through another reaction:2CHClF2 -* C2F4 + 2HCl A combination reaction occurs when two or more reactants form a single product. These are grouped into five different categories. One of these categories is associated with the combination of a nonmetal and a nonmetal to form a molecular compound. Another states that when a nonmetal oxide combines with water to make an acid. For instance when sulfur trioxide and water react sulfuric acid is made:SO3(s) + H2O(l) H2SO4(aq) Another reaction is called an ionic reaction. It occurs between two ions and can happen very quickly. For example, when silver nitrate and sodium chloride are mixed you get silver chloride:AgNO3 + NaCl -* AgCl + NaNO3The last type of reaction is called oxidation-reduction. These are reactions that involve a change in oxidation number. It is an oxidizing reaction if the oxidation number goes up. It is a reduction reaction if the oxidation number goes down. These two reactions only happen together. The number of electrons remains the same from start to finish in a redox reaction. This is an example of an unbalanced redox equation:Fe2+(aq) + MnO4-(aq) Fe3+(aq) + Mn2+(aq) It is now known that there are three types of chemical reactions. They are classified into three types: exoergic (exothermic), endoergic (endothermic), and aergic (athermic). In these cases, energy is supplied, but the different types of reactions initiate...
