Which one of the following aqueous solutions would have the higher concentration of K+ (aq) ions? (Assume total solubility in water.)
A) 1.0 M KC2H3O2
B) 1.0 M KNO3
C) 1.0 M K2CO3
D) 1.0 M K3PO4
E) All of these solutions have the same concentration of K+ (aq).
Answer: D