True. An acidic solution contains more hydrogen ions (H+) than hydroxide ions (OH–). This is one of the key characteristics that define an acidic solution. The concentration of H+ ions is higher than that of OH– ions, which results in a pH value less than 7.
In a neutral solution, the concentrations of H+ and OH– ions are equal, giving a pH of 7. In contrast, a basic (alkaline) solution has more OH– ions than H+ ions, resulting in a pH greater than 7.
Understanding the balance between H+ and OH– ions is fundamental in chemistry, especially when studying acids, bases, and pH levels.