PH

Ph is a measure of how acidic or alkaline (basic) a substance is. It helps us to know how acidic or basic something is by measuring how many hydrogen ions (H+) are in it. The more hydrogen ions in a substance, the more acidic it is. The fewer hydrogen ions in a substance, the less acidic it is. The scale for measuring how acidic or basic something is goes from 0 to 14. A number of 0 means something is very acidic, while a number of 14 means something is very alkaline (basic). Water usually has a pH of 7, which is neutral, meaning it is neither acidic nor basic.