Determine whether an aqueous solution of each of the
following salts has a pH equal to, greater than, or less than 7. If
pH > 7 or pH < 7, write a chemical equation to justify your
answer.

(a) K2C2O4, potassium oxalate;
(b) Ca(NO3)2;
(c) CH3NH3Cl, methylamine hydrochloride;
(d) K3PO4;
(e) FeCl3;
(f) C5H5NHCl, pyridinium chloride.