Solution: A student was searching the web for the pKa value of fluorene (see below). He found two contradicting numbers: 2 and 22. Since this is probably a typographical error, he will need to decide which valu

A student was searching the web for the pKa value of fluorene (see below). He found two contradicting numbers: 2 and 22. Since this is probably a typographical error, he will need to decide which value is correct. Help the student decide. Provide a **short** explanation and a chemical equation to support it.