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

Published by Prentice Hall

# Chapter 2 - Atoms, Molecules, and Ions - Exercises: 2.74a

#### Answer

$Na_3PO_4$

#### Work Step by Step

Because Sodium is bonded to a Phosphate ion, this is an ionic bond. Thus, the charges of the Phosphate and of the Sodium must cancel out. Sodium, which is an Alkali Metal, has a charge of +1. Phosphate, or ($PO_4)3-$, has a charge of 3-. In order for the charges to cancel out, there must be 3 Sodium ions for every one Phosphate ion. Because the metal always comes first when writing the chemical formula for an ionic bond, the Chemical formula for Sodium Phosphate is $Na_3PO_4$.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.