# Chapter 3 - Sections 3.1-3.12 - Exercises - Problems by Topic - Page 131: 54a

The formula of phosphoric acid is $H_{3}PO_{4}$.

#### Work Step by Step

Oxyacids with oxanions ending in -ate are named as : $'base name \hspace{1mm}of \hspace{1mm}oxyanion' + ic + acid$ Here, $phosphor$ is the basename and the oxyanion ends in $-ate$. so, the oxyanion is phosphate: $PO_{4}^{3-}$. To balance the charges, 3 hydrogen ions are present. So, the formula of phosphoric acid is $H_{3}PO_{4}$.

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.