For h3po4, ka1 = 7.3 x 10^-3, ka2 = 6.2 x 10^-6, and ka3 = 4.8 x 10^-13. a 0.10 m aqueous solution of na3po4 therefore would be

a. neutral
b. weakly basic
c. weakly acidic
d. strongly acidic
e. strongly basic

The aqueous solution of therefore would be "strongly basic."

Explanation:

Strongly basic because the is completely an ionic compound. These compound can be 100% splitted into metal ions and hydroxide ion when used in the aqueous solution. Each moles dissolves which can give rise to mole of hydrogen ions when used in the solution. Whereas strong bases are not soluble in water as well.  in the presence of water equilibrium can also be achieved. A strong base has the capability which can just remove the proton from the molecule.