help with acids and bases...?

Question

An unknown salt is either NaCN, NaC2H3O2, NaF, NaCl, or NaOCl. when 0.100 mol of the salt is dissolved in 1.00L of solutions, the pH of the solution is 8.07. What is the identity of the salt??

how do i do this??
thanks!

Answer 1

You could discount NaF and NaCl, but otherwise you will have to look up the pKa values of HCN, CH3COOH and HOCl, and work out the pH of 0.1M solutions of their salts.