Cosmetology · Basic Chemistry of Products

On the pH scale, a value of 7 is considered:

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Correct answer

Neutral

A Strongly alkaline
B Strongly acidic
C Neutral
D Impossible

Why this is the answer

On the pH scale (which runs from 0 to 14), a value of 7 is neutral — neither acidic nor alkaline. Values below 7 are acidic (with 0 being the most acidic), and values above 7 are alkaline/basic (with 14 being the most alkaline). Pure water is neutral at pH 7. Healthy skin and hair are slightly acidic (around 4.5–5.5). Understanding the pH scale is essential in cosmetology because many products and chemical services depend on raising or lowering pH to achieve their effects.

Source: Scientific Concepts — pH Scale

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About this topic: Basic Chemistry of Products

Basic chemistry of products covers matter, elements and compounds, pH and the pH scale, acids and alkalis, oxidation and reduction, and how these ideas explain what shampoos, colours and chemical services actually do to the hair. This is one of 9 Scientific Concepts questions on basic chemistry of products, each with a full explanation on a single study page.

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On the pH scale, a value of 7 is considered:

Why this is the answer

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About this topic: Basic Chemistry of Products

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