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Given the following alpha fraction plot, what is the pK31 of the polyprotic acid? 1.0000 0.8000 0.6000 α0 0.4000 α1 a2 0.2000 0.0000 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 pH O 2.3 9.9 6.1 3.8 O 1.2 Fraction

Given the following alpha fraction plot, what is the pK31 of the polyprotic acid? 1.0000 0.8000 0.6000 α0 0.4000 α1 a2 0.2000 0.0000 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 pH O 2.3 9.9 6.1 3.8 O 1.2 Fraction

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question:** Given the following alpha fraction plot, what is the \(pK_{a1}\) of the polyprotic acid? **Graph Explanation:** The plot displays the alpha fraction (\(\alpha\)) of a polyprotic acid at varying pH levels. The x-axis represents the pH, ranging from 0 to 14, and the y-axis depicts the fraction, ranging from 0.0000 to 1.0000. The graph features three curves: - **\(\alpha_0\) (blue line):** Represents the fraction of the fully protonated form of the acid. It starts at a high fraction when pH is low and decreases as pH increases. - **\(\alpha_1\) (red line):** Represents the fraction of the singly deprotonated form of the acid. This curve rises as \(\alpha_0\) falls, reaching its peak around the middle pH values. - **\(\alpha_2\) (green line):** Represents the fraction of the fully deprotonated form of the acid. This fraction increases at higher pH levels. **Observation for \(pK_{a1}\):** The \(pK_{a1}\) is found at the intersection where \(\alpha_0\) decreases and \(\alpha_1\) increases, occurring around a pH of 3.8. **Answer Choices:** - ○ 2.3 - ○ 9.9 - ○ 6.1 - ○ 3.8 - ○ 1.2
Transcribed Image Text:**Question:** Given the following alpha fraction plot, what is the \(pK_{a1}\) of the polyprotic acid? **Graph Explanation:** The plot displays the alpha fraction (\(\alpha\)) of a polyprotic acid at varying pH levels. The x-axis represents the pH, ranging from 0 to 14, and the y-axis depicts the fraction, ranging from 0.0000 to 1.0000. The graph features three curves: - **\(\alpha_0\) (blue line):** Represents the fraction of the fully protonated form of the acid. It starts at a high fraction when pH is low and decreases as pH increases. - **\(\alpha_1\) (red line):** Represents the fraction of the singly deprotonated form of the acid. This curve rises as \(\alpha_0\) falls, reaching its peak around the middle pH values. - **\(\alpha_2\) (green line):** Represents the fraction of the fully deprotonated form of the acid. This fraction increases at higher pH levels. **Observation for \(pK_{a1}\):** The \(pK_{a1}\) is found at the intersection where \(\alpha_0\) decreases and \(\alpha_1\) increases, occurring around a pH of 3.8. **Answer Choices:** - ○ 2.3 - ○ 9.9 - ○ 6.1 - ○ 3.8 - ○ 1.2
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