Explanation:

pH is a measurement of electrically charged particles in a substance. It indicates how acidic or alkaline (basic) that substance is. The pH scale ranges from 0 to 14:

Acidic water has a pH lower than 7. The most acidic substances have a pH of 0. Battery acid falls into this category.
Alkaline water has a pH of 8 or above. The most alkaline substances, such as lye, have a pH of 14.
Pure water has a pH of 7 and is considered “neutral” because it has neither acidic nor basic qualities.