# What is the role of acid in keto enol tautomerism [closed]

I have heard about an acid acting as a catalyst in keto enol tatutomerism.I have yet to understand the mechanism of the reaction though.pictorial depictions are welcome.

## closed as off-topic by Todd Minehardt, Jan, M.A.R. ಠ_ಠ, jerepierre, ronOct 6 '15 at 19:22

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• Please see the site's homework policy. You should amend your post to include what work you've done towards an answer. – Todd Minehardt Oct 6 '15 at 17:30
• ill do it next time onwards.I am new to this site. – hybrid1999 Oct 6 '15 at 17:34

If enol is the starting compound, markovnikov's addition of $\ce{H+}$ occurs.