Chapter 2 - Atoms, Molecules, and Ions - Questions and Exercises - Exercises - Page 87: 2.99

(a) hydrochloric acid (b) nitrous acid (c) perchloric acid

(a) hydrochloric acid If the name of the anion ends in $-ide$, then we add the prefix $hydro-$ to the anion, change the anion ending from $-ide$ to $-ic$, and add the word $acid$ to the end. (b) nitrous acid If the oxoanion ends in $-ite$, then we drop this ending, substitute the ending $-ous$ in its place, and add the word $acid$ to the end. (c) perchloric acid If the oxoanion ends in $-ate$, then we drop this ending, substitute the ending $-ic$ in its place, and add the word $acid$ to the end.