The amino acid histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, as shown. COO™ COO™ H₂N-CH H₂N-CH CH H CH N bbbb 6.0 CH H N COOH H₂N-CH CH₂ H -N CH lonizable -COOH group 1.8 COO -HisH+ -His CH -NH COO™ H₂N-CH 9.2 CH, H H N -NH₂ CH A biochemist makes up 80 mL of a 0.11 M solution of histidine at a pH of 5.1. She then adds 60 mL of 0.10 M HCl. What is the pH of the resulting solution?
The amino acid histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, as shown. COO™ COO™ H₂N-CH H₂N-CH CH H CH N bbbb 6.0 CH H N COOH H₂N-CH CH₂ H -N CH lonizable -COOH group 1.8 COO -HisH+ -His CH -NH COO™ H₂N-CH 9.2 CH, H H N -NH₂ CH A biochemist makes up 80 mL of a 0.11 M solution of histidine at a pH of 5.1. She then adds 60 mL of 0.10 M HCl. What is the pH of the resulting solution?
General, Organic, and Biological Chemistry
7th Edition
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:H. Stephen Stoker
Chapter20: Proteins
Section: Chapter Questions
Problem 20.48EP: Most amino acids have isoelectric points between 5.0 and 6.0, but the isoelectric point of lysine is...
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