pH Scale

p (represents a quantity) and H (represents the hydrogen ion)

pH represents the quantity of hydrogen ions

The pH scale is used to measure the acidity and alkalinity of substances.

❗❗It has a range of 0 to 14.

• A pH of 7 is neutral solution

• A pH below 7 indicates an acidic solution

• A pH above 7 indicates an alkaline solution

The pH is always a balance of both acidity and alkalinity.

Pure water has a pH of 7 so it has an equal balance therefore: neutral

However for our hair and skin, it is not neutral with an average of 4.5 or 5.5. So it is slightly acidic.

▶ The average for skin is 5

The pH scale is also a logarithmic scale, a change of one whole number represents a tenfold change in pH.

Example: a pH of 8 is 10 times more alkaline than a pH of 7.

Also change of two whole number represents a change of 10 times of a 100-fold change.

Example: a pH of 9 times is 100 times more alkaline than a pH of 7.

Pure water is a pH of 7 meaning that it is 100 times more alkaline then our hair and skin.