Predicting Metathesis Reactions (Chapter 4)

Metathesis or double replacement reactions take place when anions and cations of two salts change partners. A metathesis reaction will occur if there is a net ionic equation. This happens if (1) a precipitate forms from soluble reactants, (2) an acid-base neutralization occurs, (3) a gas is formed, or (4) a weak electrolytes. You should learn the solubility rules, and remember that all salts are strong electrolytes. Remember that all strong acids and bases are strong electrolytes, too. Strong acids react with strong bases in neutralizations reactions to produce a salt and water. Acids react with insoluble oxides and hydroxides to form water and the corresponding salt. Many acid-base neutralization reactions can be viewed as a type of metathesis reaction in which one product is water. Be sure to learn the reactions that produce gases in metathesis reactions.





Source = Brady, James E. 2009. Chemistry Fifth Edition. Asia : John Willey & Sons