The pH scale measures how acidic or alkalizing a substance is. The pH scale ranges from 0 to 14. A pH of higher than 7 is alkalizing (also called basic). A pH less than 7 is acidic and a pH of 7 is considered neutral.pH stands for “potential hydrogen”. pH is defined as “the measurement of electrical resistance between negative and positive ions in the body”. pH of higher than 7 is alkalizing (also called basic). A pH less than 7 is acidic and a pH of 7 is considered neutral. pH stands for “potential hydrogen”. pH is defined as “the measurement of electrical resistance between negative and positive ions in the body”.