http://www.google.com/search?hl=en&ie=UTF-8&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=trifluoroacetic+acid&spell=1
What would happen to the strength of acetic acid if the three hydrogens that were on thte adjoining carbon were replaced with fluorines?
It would become a much stronger acid.
That would be F3C-COOH