The pH scale is a measure of how acidic or basic a chemical substance is.
|Strength||strong acids||weak acids||neutral||weak bases||strong bases|
|Examples||Car acid batteries||Lemon juice||Water||Toothpaste||Oven cleaner|
Each pH unit changes in strength by a factor of 10.
An acid of pH 1 is 1000 times stronger than an acid of pH 4.
A base of pH 14 is 100 times stronger than a base of pH 12.
The pH is a logarithmic measure of the concentration of hydrogen ions, H+ in solution.
Chemists use the formula pH = -log10[H+] to determine the pH of a substance.