Yes, the amount of H⁺ or OH⁻ ions present in a solution can be quantitatively determined through techniques like titration or pH measurement. In titration, a known concentration of a base or acid is gradually added to the solution until the equivalence point is reached, allowing the determination of the unknown concentration. pH measurement, using a pH meter or indicators, provides a quantitative measure of the hydrogen ion concentration. The pH scale directly correlates with H⁺ ion concentration in a logarithmic manner. These methods enable precise quantification of acidity or alkalinity in a solution.