Stasik P. answered 10/11/20
5th Year PhD student in Organic Chemistry at UCLA
Hi Heyam,
Treating ether with strong acid and nucleophile will result in protonation of the ether to give an oxonium followed by an SN2 reaction to give an alcohol as well as a substitution product.
An example would be
EtOEt + HI. -------> EtI + EtOH
Let me know if anything doesn't make sense!