198 CHAPTER 5 Chemical Reactions Practice Problems 5.24 Determine if the reactions in Problem 500 reversible or irreversible. 5.25 Write the products and balance the follos tion for the complete combustion of ethane CH() + O2(g) —? 5.21 Categorize the following reactions as synthesis, decomposition, or exchange reactions in the forward direction: a. Cuo(s) + 2HCl(aq) —> CuCl2(aq) + H2O(1) b. CH,206(ag) -> 2C,H,O(aq) + 2CO (9) c. 2H269) + O2(8) = 2H2O) 5.22 Categorize the following reactions as synthesis, decomposition, or exchange reactions in the forward direction: a. N2(g) + 3H2(g) = 2NH3(g) b. CH.68) - 202() ----> CO2(g) + 2H2O(g) c. Al(SO4)3(aq) + 6KOH(aq) ► 2Al(OH)3() + 3K SO.(aq) 5.23 Determine if the reactions in Problem 5.21 are reversible or irreversible. 5.26 Write the products and balance the follow tion for the complete combustion of buta C_H109) + O2(g) — ? 5.27 Lisithe similarities between chemical e in organic chemistry and chemical equa biochem.uy 5.28 List the differences between general ch equations and organic chemical equati DISCOVERING THE CONCEPTS INQUIRY ACTIVITY-Oxidation-Reduction Reactic Information Oxidation-reduction reactions, also called redox reactions, can of two ways: (1) they contain metal ions and involve the exchan (inorganic), or (2) they can involve the addition or removal of Ox (organic). Oxidation and reduction reactions always occur ober is oxidized at the same time that the other substance is read reactants can be mixed (a metal and an organic molecule). TABLE 1 Characteristics of Oxidation