Draw the mechanism for the the reaction of benzene with chlorine. What Lewis acid is generally used as a catalyst? Explain why this catalyst is necessary and how it works

Explanation:

The reaction of benzene with chlorine yields a compound known as chloro benzene. The reaction proceeds in the presence of aluminium chloride catalyst. The reaction mechanism which is also called electrophic substitution is shown diagrammatically in the attached file.

Or we can also show the balanced equation as:

C6H6 +Cl2 => C6H5Cl + HCl.

Lewis acid: the catalyst utilized in this process is known as a Lewis acid. It is a metal-based  acid which functions by accepting an electron pair in the reaction. In doing this, the reactivity of the reactant is improved.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.