Carbon dioxide and water readily combine to form carbonic acid. The change in pH as the acid dissociates can be demonstrated with an indicator dye that changes colour at a particular pH. In your physiology lab, you perform this experiment in two beakers containing room-temperature water and indicator, labelled Resting and Exercise based upon the status of the student who exhaled through a straw into the solution. The Resting student had been sitting at the table for 30 minutes before exhaling while the Exercise student had just finished sprinting up the stairs to class late. A stopwatch was used to measure how long it took for the solutions to change colour. The data is shown in the table below. Table 1: Time for reaction to change colour when at rest or exercising... Time for reaction Time for reaction (seconds): Resting (seconds): Exercising Student 1 2 23 123 114 136 20 23 17 Refer to the table. Explain why the time required for the colour to change was different between the students at rest and exercising.