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Types of inorganic chemical reactions
I. Combination Reactions Two or more reactants form one product in a combination reaction. An example of a combination reaction is the formation of sulfur dioxide when sulfur is burned in air:
S (s) + O2 (g) --> SO2 (g)
II. Decomposition Reactions In a decomposition reaction, a compound breaks down into two or more substances. Decomposition usually results from electrolysis or heating. An example of a decomposition reaction is the breakdown of mercury (II) oxide into its component elements:
2HgO (s) + heat --> 2Hg (l) + O2 (g)
III. Single Displacement Reactions A single displacement reaction is characterized by an atom or ion of a single compound replacing an atom of another element. An example of a single displacement reaction is the displacement of copper ions in a copper sulfate solution by zinc metal, forming zinc sulfate:
Zn (s) + CuSO4 (aq) --> Cu (s) + ZnSO4 (aq) Single displacement reactions are often subdivided into more specific categories, e.g., redox reactions - chemical reactions which involve oxidation and reduction. IV. Double Displacement Reactions
CaCl2 (aq) + 2 AgNO3 (aq) --> Ca(NO3)2 (aq) + 2 AgCl (s) A neutralization reaction is a specific type of double displacement reaction that occurs when an acid reacts with a base, producing a solution of salt and water. An example of a neutralization reaction is the reaction of hydrochloric acid and sodium hydroxide to form sodium chloride and water: HCl (aq) + NaOH (aq) --> NaCl (aq) + H2O (l) Remember that reactions can belong to more than one category. Also, it would be possible to present more specific categories, such as combustion reactions or precipitation reactions. Tasks
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