What is the pH of .1M:

Question

FeSO4
Na2HPO4
NaH2PO4
NaF

Answer 1

pH of NaF solution is determined by the hydrolysis of the F^-.
.......F^- + HOH ==> HF + OH^-
I.....0.1.............0....0
C......-x.............x....x
E....0.1-x............x....x

Kb for F^- = (Kw/Ka for HF) = (x)(x)/(0.1-x) and solve for x = (OH^-). Convert to pH.

The others are done similarly.