A pH test measures the acidity or alkalinity of a solution on a scale from 0 to 14. A pH of 7 is considered neutral, while values below 7 indicate acidity and values above 7 indicate alkalinity. This test is commonly used in various fields, including chemistry, biology, and environmental science, to assess the properties of liquids. To perform a pH test, one can use pH strips, a pH meter, or liquid indicators. pH strips change color based on the solution's pH level, while a pH meter provides a digital reading. Understanding pH is essential for applications like agriculture, water quality testing, and laboratory experiments.