Q:

What is the pH level of soap?

A:

Quick Answer

The pH level of soap is 10. Because soaps are basic, they can effectively clean off the acid mantle of the skin and remove dirt.

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Full Answer

The pH scale measures the concentration of hydrogen ions in a chemical or substance and classifies it as acidic or basic, also called alkaline. A pH level of 7 is neutral, such as water, while a pH level below 7 is acidic and above 7 is basic. With a pH level of 10, soap is an alkaline or base.

The acid mantle on the skin serves as a protective layer, but it also builds up dirt, oils and germs. The alkalinity of soap breaks down this acidity through a neutralization reaction which cleanses the skin.

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