3. When an acid is neutralized by a base in the presence of phenolphthalein, a faint purple-pink color is observed at the end point; however, after a few minutes, the solution becomes colorless. a. What can you say about the solution when it has a faint purple-pink color? What must have changed about the solution for the color to go away? Assume that the phenolphthalein is still present. b. The cause of the change is the carbon dioxide that is in the air. Rising levels of CO₂ in the atmosphere pose serious concerns not only for the temperature of the earth, but also a process known as ocean acidification. What is ocean acidification, and why is it a concern?

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
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3. When an acid is neutralized by a base in the presence of phenolphthalein, a faint purple-pink color is
observed at the end point; however, after a few minutes, the solution becomes colorless.
a.
What can you say about the solution when it has a faint purple-pink color? What must have changed
about the solution for the color to go away? Assume that the phenolphthalein is still present.
b. The cause of the change is the carbon dioxide that is in the air. Rising levels of CO2 in the atmosphere
pose serious concerns not only for the temperature of the earth, but also a process known as ocean
acidification. What is ocean acidification, and why is it a concern?
8/16/2023
Transcribed Image Text:3. When an acid is neutralized by a base in the presence of phenolphthalein, a faint purple-pink color is observed at the end point; however, after a few minutes, the solution becomes colorless. a. What can you say about the solution when it has a faint purple-pink color? What must have changed about the solution for the color to go away? Assume that the phenolphthalein is still present. b. The cause of the change is the carbon dioxide that is in the air. Rising levels of CO2 in the atmosphere pose serious concerns not only for the temperature of the earth, but also a process known as ocean acidification. What is ocean acidification, and why is it a concern? 8/16/2023
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