Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. What is the molar concentration of H3O+ in a cola that has a pH of 3.120? Express your answer with the appropriate units.

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter15: Solutions Of Acids And Bases
Section: Chapter Questions
Problem 15.54QE: Assuming that the conductivity of an acid solution is proportional to the concentration of H3O+,...
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Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid.

What is the molar concentration of H3O+ in a cola that has a pH of 3.120?

Express your answer with the appropriate units.
Learning Goal:
To calculate pH and use it as a measure of acidity.
The pH expresses the molar concentration of hydronium ions in an aqueous solution on a
logarithmic scale:
pH = -log|H,O*]
[H3O+] = 10 PH
As pH decreases, acidity increases. As pH increases, acidity decreases.
%3D
• Acidic solution: pH < 7
Neutral solution: pH = 7
Basic solution: pH > 7
Transcribed Image Text:Learning Goal: To calculate pH and use it as a measure of acidity. The pH expresses the molar concentration of hydronium ions in an aqueous solution on a logarithmic scale: pH = -log|H,O*] [H3O+] = 10 PH As pH decreases, acidity increases. As pH increases, acidity decreases. %3D • Acidic solution: pH < 7 Neutral solution: pH = 7 Basic solution: pH > 7
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