# What would be the correct mechanism for hydration of ethene?

Given above is the mechanism that I drew but my textbook puts it a bit differently. It says that the ethene is dissovled in the concentrated $\ce{H2SO4}$ to form ethyl hydrogen sulphate $\ce{CH3-CH2OSO3H}$ which when diluted with water reacts to form ethanol and the acid $$\ce{CH3CH2OSO3H + H-OH -> CH3CH2OH + H2SO4}$$ So which mechanism is true?

• I think that the first mechanism occurs when a solution of sulphuric acid in water is reacted with ethene. The second mechanism occurs if you first add conc. H2SO4 to ethene, and then add water. I am not fully sure, though. I will answer if I get a reference to back my claim. – Shoubhik Raj Maiti Dec 3 '17 at 9:09