How do you convert methyl chloride to ethyl chloride?

Methyl chloride can be converted to ethyl chloride by reacting it with ethyl alcohol (ethanol) in the presence of an acid catalyst, such as sulfuric acid. The reaction is an SN1 substitution reaction where the methyl group on methyl chloride is replaced by an ethyl group from ethanol, forming ethyl chloride. The reaction proceeds via the formation of a carbocation intermediate.