Problem: Which one of the following substances is a Lewis acid?A. CH4B. H2C. H2OD. NH3E. BF3

FREE Expert Solution

We’re being asked to determine which of the given compounds is a Lewis acid

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

▪ can accept negative electron pairs → can act as Lewis Acids

Central element that has less than 8 valence electrons around it

▪ more likely to accept an electron pair to follow the octet rule
▪ can accept electron pair → can act as Lewis acid

Lewis base is an electron pair donor.

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Problem Details

Which one of the following substances is a Lewis acid?

A. CH4

B. H2

C. H2O

D. NH3

E. BF3

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