The pH scale
The pH scale measures a solution鈥檚 acidity or alkalinity. The range for the pH scale is 0 (strong acid) to 14 (strong alkali).
- pH 0 鈥 2: strong acid
- pH 3 鈥 6: weak acid
- pH 7: neutral
- pH 8 鈥 11: weak alkali
- pH 12 鈥 14: strong alkali
Universal indicator solution or paper turns a range of colours, depending on the strength of the Corrosive substance which has a pH lower than 7. Acidity is caused by a high concentration of hydrogen ions. or A base which is soluble in water..