Electrophilic Substitution

[violeta]

The benzene are sulphonated using acid sufuric.

Please show me how the substitution happened as i really don't see how SO3H can attached to the benzene group and how the SO3H are separated from H2SO4. I really need to understand this substitution..

Thanks

[Gokul43201]

1. Henceforth, please use the homework subforums for questions like these.

2. The actual electrophile here is SO3. Think about that, and see if you can figure it out.