Question

what is the name for $\ce{po_4^{3-}}$?
a. phosphate
b. phosphide
c. phosphite
d. hypophosphite

Explanation:

To determine the name of \( \text{PO}_4^{3-} \), we recall the naming of polyatomic ions. The phosphate ion has the formula \( \text{PO}_4^{3-} \). Phosphide is \( \text{P}^{3-} \), phosphite is \( \text{PO}_3^{3-} \), and hypophosphite is \( \text{H}_2\text{PO}_2^- \). So the correct name for \( \text{PO}_4^{3-} \) is Phosphate.

Answer:

A. Phosphate