Chapter 12: Q71E. (page 710)
What is the rate equation for the elementary termolecular reaction A + 2B⟶products? For 3A⟶products?
For any reaction, the rate is given by the product of the concentration of the reactant, where each reactant concentration is raised to the power of the stoichiometric ratio.
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The hydrolysis of the sugar sucrose to the sugars glucose and fructose, \({{\bf{C}}_{{\bf{12}}}}{{\bf{H}}_{{\bf{22}}}}{{\bf{O}}_{{\bf{11}}}}{\bf{ + }}{{\bf{H}}_{\bf{2}}}{\bf{O}} \to {{\bf{C}}_{\bf{6}}}{{\bf{H}}_{{\bf{12}}}}{{\bf{O}}_{\bf{6}}}{\bf{ + }}{{\bf{C}}_{\bf{6}}}{{\bf{H}}_{{\bf{12}}}}{{\bf{O}}_{\bf{6}}}\) follows a first-order rate equation for the disappearance of sucrose: \({\bf{Rate = k}}\left( {{{\bf{C}}_{{\bf{12}}}}{{\bf{H}}_{{\bf{22}}}}{{\bf{O}}_{{\bf{11}}}}} \right)\) (The products of the reaction, glucose and fructose, have the same molecular formulas but differ in the arrangement of the atoms in their molecules.)
Determine which of the two diagrams here (both for the same reaction) involves a catalyst, and identify the activation energy for the catalyzed reaction:
Based on the diagrams in Exercise 12.83, which of the reactions has the fastest rate? Which has the slowest rate?
What is the difference between average rate, initial rate, and instantaneous rate?
Consider the following reaction in aqueous solution:
\(\)
\({\bf{5B}}{{\bf{r}}^ - }\left( {aq} \right) + BrO_3^ - \left( {aq} \right) + 6{H^ + }\left( {aq} \right) \to 3B{r_2}\left( {aq} \right) + 3{H_2}O\left( l \right)\)
If the rate of disappearance of Br– (aq) at a particular moment during the reaction is 3.5 × 10−4 M s −1, what is the rate of appearance of\({\bf{B}}{{\bf{r}}_{\bf{2}}}\)(aq) at that moment?
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