Simplify the following text for a Grade 11 native English-speaking person.
Original: All three sodium chlorite chemistries can produce chlorine dioxide with high chlorite conversion yield , but unlike the other processes the chlorite-HCl method produces completely chlorine free chlorine dioxide but suffers from the requirement of 25 % more chlorite to produce an equivalent amount of chlorine dioxide .
Simplified: Sodium chlorite reacts with hydrochloric acid to make chlorine dioxide .