1) Butan-1-ol is mixed with a concentrated solution of sodium bromide.
What is going on?
2) Hydrochloric acid is added.
What should we expect?
1)
Nothing happens. The preliminary attack of $H^+$ is essential to form the water molecule, which is a weak nucleophilic leaving group and thus leaves easily.
2)
A mixture of 1-chlorobutane and 1-bromobutane is produced since there are now both nucleophilic $ Cl^-$ and $Br^-$ in presence.
