Choose the Best Answer · Q10
Q.In aqueous solution of amino acids mostly exists in,
a) NH₂-CH(R)-COOH
b) NH₂-CH(R)-COO⁻
c) H₃N⁺-CH(R)-COOH
d) H₃N⁺-CH(R)-COO⁻
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Start your 14-day free trial to unlock the full solution →Step 1. As covered in §14.2.3, in aqueous solution the acidic proton of an amino acid's -COOH group is transferred internally to its basic -NH₂ group, even near neutral pH.
Step 2. This internal proton transfer leaves the amino group protonated (-NH₃⁺, positively charged) and the carboxyl group deprotonated (-COO⁻, negatively charged) on the very same molecule -- a species called a zwitterion, which is electrically neutral overall despite carrying both a positive and a negative charge. …
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