## Chemistry: The Central Science (13th Edition)

Sodium ion $K^{+}$ has a +1 charge and Dihydrogen phosphate ion $H_{2}PO_{4}^{-}$ has a -1 charge. Since the charges are balanced the chemical formula will be $NaH_{2}PO_{4}$ and thus, the name of the ionic compound will be Sodium dihydrogen phosphate.