In the video, you learned that aqueous solutions of some molecules are named as acids. When naming an acid, first identify the anion present, then name the acid using the rules summarized in this table.

• An acid containing a monatomic ion ending with “-ide” will have an acid name beginning with “hydro-” and ending with “-ic.”
• An acid containing a polyatomic ion ending with “-ite” will have an acid name ending with “-ous.”
• An acid containing a polyatomic ion ending with “-ate” will have an acid name ending with “-ic.”

Look at this example

The acid formed by the aqueous solution of hydrogen iodide (HI) is used to disinfect and sanitize medical tools. What is the name of this acid?

Show Me

Because the anion in this acid is the iodide ion, the name of an aqueous solution of HI is called hydroiodic acid.

Let's Practice

Complete this activity to practice naming acids. Write the name of each acid. Then, at the end of the activity, compare your responses to the correct acid names.