The reaction between ethyl alcohol and ethyl bromide forms diethyl ether via a substitution reaction, followed by deprotonation. Identify the electrophilic and nucleophilic site of the addition reaction.

Explanation:

According to the attached mechanism, we have a Sn1 reaction. The diethyl ether formed is because we have a nucleophilic site and an electrophilic site. Now which one is?.

If you see the mechanism below, you can see that the -OH has a lone pair of electrons. This lone pair attacks the carbon that is attached to the bromine. This attack, makes the ethyl alcohol the nucleophyle, and the ethyl bromide, which have the leaving group (The bromine) the electrophyle.

You can see the mechanism below to understand the formation of this product.

Hope this helps