pH control refers to the process of maintaining the acidity or alkalinity of a solution within a specific range. This is important in various fields, including agriculture, water treatment, and chemical manufacturing. The pH scale ranges from 0 to 14, with values below 7 indicating acidity, 7 being neutral, and above 7 indicating alkalinity. In agriculture, for example, proper pH control ensures that soil conditions are optimal for plant growth. Certain plants thrive in specific pH levels, and adjusting the soil's pH can enhance nutrient availability. Similarly, in water treatment, maintaining the right pH is crucial for effective disinfection and pollutant removal.