What are the pH levels?

pH levels are a measure of the acidity or alkalinity of a solution, ranging from 0 to 14. A pH of 7 is considered neutral, with lower values indicating acidity and higher values indicating alkalinity. The pH scale is logarithmic, meaning each whole number change represents a tenfold difference in acidity or alkalinity. For example, a solution with a pH of 3 is ten times more acidic than a solution with a pH of 4.