Zwitterion in Chemistry
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Questions and Answers

What is a zwitterion?

  • A molecule with only positively charged functional groups
  • A molecule that cannot form hydrogen bonds
  • A molecule with equal number of positively and negatively charged functional groups (correct)
  • A molecule with only negatively charged functional groups

    • What are betaines?

  • Molecules that do not form hydrogen bonds
  • Zwitterions that cannot isomerize to an all-neutral form (correct)
  • Zwitterions with only positively charged functional groups
  • Molecules with uneven distribution of charges

    • What is the stoichiometry for tautomerism of amino acids?

  • RCH(NH2)CO2H + RCN(N+H3)CO−2
  • RCH(NH2)CO2H ⇌ RCN(N+H3)CO−2 (correct)
  • RCH(NH2)CO2H → RCN(N+H3)CO−2
  • RCH(NH2)CO2H ↔ RCN(N+H3)CO−2

    • How are zwitterions stabilized in aqueous solution?

    <p>By hydrogen bonding with solvent water molecules</p> Signup and view all the answers

    What do the pKa values for deprotonation of the common amino acids span approximately?

    <p>The range 2-10</p> Signup and view all the answers

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