Rapid reaction by flow technique

To determine by a flow technique the second-order rate constant for the reaction between carbon dioxide and hydroxyl ion. 

Owing to the experimental difficulties of this technique the accuracy obtainable is certainly not as good as 20%. Salt effects wiU accordingly be neglected and the solution treated as ideal dilute. 

More accurate results for this reaction have recently been obtained by following the reaction by the heat evolved the temperature at points in the flow tube was measured by inserting a thermocouple (see Roughton, chapter 10, part 3, in Technique of organic chemistry , volume VIII, Intersdence, 1953). The value of k a.t 16.5 C is 

To show that the kinetics of the reaction between ferric and iodide ions are consistent with a suggested mechanism. 

Application of the stationary-state hypothesis to the intermediate I7 gives 

---