Question: what is the difference in hydrogen ion concentration between hydrochloric acid and a lemon?
Answer: Answer Expert Verified. Answer is: hydrogen ion concentration (H⁺) is greater in hydrochloric acid than a lemon with same concentration of both solutions. Strong acids (in this example hydrochloric acid) completely ionize in water and give large amount of hydrogen ions (H⁺): HCl(aq) → H⁺(aq) + Cl⁻(aq).