HCl:Hydrochloric acid, a strong acid that dissociates in water to produce hydrogen ions (H+) and chloride ions (Cl-).
NaF:Sodium fluoride, an ionic compound made up of sodium ions (Na+) and fluoride ions (F-) that easily dissolves in water.
Solution:A homogeneous mixture where one substance called the solute dissolved completely into another substance called the solvent.