Answer
A strong acid is able to completely ionize in solution, meaning that every molecule will produce $H_3O^+$ ions. Example: HCl
Weak acids do not completely ionize in solution, meaning that some acid molecules will not react and some will produce $H_3O^+$ in a chemical equilibrium situation. Example: HF
Work Step by Step
A strong acid is able to completely ionize in solution, meaning that every molecule will produce $H_3O^+$ ions. Example: HCl
Weak acids do not completely ionize in solution, meaning that some acid molecules will not react and some will produce $H_3O^+$ in a chemical equilibrium situation. Example: HF