West Virginia Barber Written Practice Exam 2025 – Complete Study Resource

Question: 1 / 400

What measures the acidity or alkalinity of a solution, such as shampoo or conditioner?

pH scale

The correct answer is A. pH scale. The pH scale is specifically designed to measure the acidity or alkalinity of a solution. In the context of hair care products like shampoo or conditioner, it is important to know the pH level to ensure they are within the optimal range for hair health. Electrical conductivity (choice B), thermal index (choice C), and mass density (choice D) do not directly measure the acidity or alkalinity of a solution like the pH scale does.

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Electrical conductivity

Thermal index

Mass density

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