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Author Question: The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid, ... (Read 124 times)

rlane42

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on: Feb 15, 2020

Question 1

Oxalic acid, H2C2O4 has acid dissociation constants Ka1 = 5.9 × 10-2 and Ka2 = 6.4 × 10-5. What is the pH after 20.00 mL of 0.0500 M NaOH is added to 5.00 mL of 0.2000 M H2C2O4?
◦ 2.80
◦ 2.10
◦ 1.23
◦ 4.19

Question 2

The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid, H2X+) are Ka1 = 4.6 × 10-3 and Ka2 = 2.0 × 10-10. What is the pH of 50.00 mL of a 0.0500 M solution of alanine after 25.00 mL of 0.100 M NaOH has been added?
◦ 5.59
◦ 4.85
◦ 6.72
◦ 2.34
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
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Marked as best answer by rlane42 on Feb 15, 2020

aidanmbrowne

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Reply #1 on: Feb 15, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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rlane42

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Reply 2 on: Feb 15, 2020
Excellent

scottmt

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Reply 3 on: Yesterday
Gracias!

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