Based on the Lewis definition:
Lewis acid is an electron pair acceptor.
Some characteristics of a Lewis acid:
• When hydrogen is connected to an electronegative element such as P, O, N, S or halogens
▪ hydrogen gains a partially positive charge → makes hydrogen act as a Lewis acid
• Positively charged metal ions
For the following reaction, indicate which reactant is the Lewis acid and which is the Lewis base.
a) CH3COCl is the Lewis acid.
b) CH3COCl is the Lewis base.
c) FeCl3 is the Lewis acid.
d) FeCl3 is the Lewis base.
e) This not a Lewis acid-base reaction.
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