Consider the following statements regarding the pH scale and acidic solutions: 1. A neutral solution at room temperature has a pH value of exactly 7. 2. Strong acids undergo complete ionization in aqueous solutions, producing a high concentration of hydronium ions. Which of the statements given above is/are correct?

💡 Solution & Explanation

The pH scale ranges from zero to fourteen, where a pH of 7 denotes neutrality at standard temperature, values below 7 indicate acidity, and values above 7 indicate alkalinity. Strong acids like hydrochloric acid and sulfuric acid dissociate completely in water to release high concentrations of hydrogen ions. Sorensen introduced the pH scale in 1909 to express hydrogen ion concentration conveniently. Buffer solutions resist drastic changes in pH when small amounts of acid or base are added.