Zwitterions and Betaines
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Questions and Answers

What is a zwitterion in chemistry?

  • A molecule that cannot isomerize to an all-neutral form
  • A molecule containing only negatively charged functional groups
  • A molecule containing an equal number of positively and negatively charged functional groups (correct)
  • A molecule containing only positively charged functional groups
  • What is the stoichiometry of tautomerism of amino acids?

  • RCH(NH2)CO2H ⇌ RCN(N+H3)CO−2 (correct)
  • RCH(NH2)CO2H ⇌ RCN(NH2)CO2H
  • RCH(NH2)CO2H ⇌ RCNHCO2H
  • RCH(NH2)CO2H ⇌ RCH2(NH2)CO2H
  • How is the zwitterion stabilized in aqueous solution?

  • By repelling solvent water molecules
  • By donating electrons to solvent water molecules
  • By forming covalent bonds with solvent water molecules
  • By hydrogen bonding with solvent water molecules (correct)
  • What is the ratio of the concentrations of the two species in solution for tautomerism of amino acids?

    <p>Independent of pH</p> Signup and view all the answers

    What is the role of some amino acids in forming mixed salts?

    <p>They may form mixed salts and provide supplementary recognition options</p> Signup and view all the answers

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