Carbon Dioxide and Water Readily Combine to Form Carbonic Acid

question 108

Essay

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 color at a particular pH.In your physiology lab,you perform this experiment in two beakers containing room-temperature water and indicator,labeled 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 color.The following data were generated by the students.Explain why the time required for the color to change was different between groups,using the word substrate in your answer.

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Imports

Products or services imported into a country from overseas for the purpose of selling.

Price

The funds expected, demanded, or provided in exchange for a particular good or service.

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Devices that can read information stored on CD-ROMs, which are used for the digital storage of data.

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