Classify each of the following as a Lewis acid or a Lewis base. Lewis acid Lewis base

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Classify each of the following as a Lewis acid or a Lewis base. Lewis acid Lewis base

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Answer:

Lewis Acid is an electron pair acceptor and Lewis base is an electron pair donor.

Lewis Acids:

  • BeCl2: Here Be has an incomplete octet and can therefore accept electrons

  • SO2 : Here S atom gains its octet via multiply bonding with one of the O atoms. Such molecules behave as lewis acids

  • Fe3+ : It has vacant d-orbitals that can accept electrons

Lewis Bases:

  • H2O : lone pair on O atom for donation

  • I-: negative charge, electron pair for donation