Cosmetology · Basic Chemistry of Products

Pure water is an example of which of the following?

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Correct answer

A neutral substance (pH 7)

A A neutral substance (pH 7)
B A strong alkali
C A strong acid
D An emulsion

Why this is the answer

Pure water is a neutral substance with a pH of 7 — neither acidic nor alkaline. It serves as the reference point for the pH scale. In cosmetology, water is also the most common solvent, used to dilute and mix many products. (Tap water may vary slightly due to dissolved minerals, but pure water is defined as neutral.) Recognizing pure water as the pH-7 neutral standard is a basic chemistry fact within the scientific-concepts content of the licensing exam.

Source: Scientific Concepts — Neutral Water

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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.

New to this exam? Our Cosmetology exam guide explains the format, scoring, and how to prepare.

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Pure water is an example of which of the following?

Why this is the answer

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About this topic: Basic Chemistry of Products

Related questions

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

The natural pH of healthy hair and skin is approximately:

Because the pH scale is logarithmic, a solution of pH 9 is how much more alkaline than a solution of pH 7?

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