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Chemistry · Unit 4 · Properties and structure of organic materials · Structure of organic compounds

Explain the acid-base properties of 2-amino acids, including the formation of zwitterions. Analytical techniques

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Question 1

Glycine is a 2-amino acid with the structure \( \text{H}_2\text{NCH}_2\text{COOH} \). In aqueous solution at physiological pH (approximately 7.4), which statement best explains the predominant form of glycine?

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Question 2

Alanine is a 2-amino acid with the structure \(\text{CH}_3\text{CH(NH}_2\text{)COOH}\). In aqueous solution at physiological pH (7.4), which form of alanine predominates?

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Question 3

Explain why the amino acid glycine (\(\text{H}_2\text{NCH}_2\text{COOH}\)) exists predominantly as a zwitterion at physiological pH (7.4).

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