an unknown salt is either NaCN,NaC2H3O2, NaF, NaCl, or NaOCl. when 0.100 molar of the salt is dissolved in 1.00 L of solution, the ph of the solution is 8.07. what is the identity of the salt?

Question

where do I start? How do I solve it, cuz im not gettign right answer.

Answer 1

All of these hydrolyze (actually NaCl does not) like this.
..........A^- + HOH ==> HA + OH^-
I.......0.1..............0....0
C........-x..............x....x
E......0.1-x.............x....x

Kb for base = (Kw/Ka for HA) = (HA)(OH^-)/(A^-)
Substitute Kw, you have pH, I would convert that to pOH then to OH, substitute for OH and HA (they are the same), and solve for Ka. Then compare the Ka for HCN, HC2H3O2, HF, etc etc until you find the one with the right Ka value. That will tell you the salt you have. As you already know, it isn't NaCl because NaCl is pH = 7 in water solution.

Answer 2

poopoo