For HaP04 Ka173 x 103 Ka2 62 x 100 and Ka3 therefore would

For HaP04, Ka1-7.3 x 10-3, Ka2 = 6.2 x 10-0, and Ka3 therefore would be acidic neutral

Solution

NaH2PO4 <--> Na+ + H2PO4-

Acidic solution

Because it made from strong acid nad weak base
Sodium dihydrogen phosphate, is an acid. The two hydrogen atoms can dissociate and lower the ph of a solution.