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What does the pH scale measure?

The amount of moisture in the air

The acidity or alkalinity of a substance

The pH scale measures the acidity or alkalinity of a substance, which is a crucial concept in chemistry and various beauty and skincare practices. Acidity is indicated by a pH value lower than 7, while alkalinity is represented by a pH value higher than 7. A pH of 7 is considered neutral.

Understanding the pH scale helps beauty professionals select the right products for clients, ensuring that skin, hair, and nail treatments are performed safely and effectively. For example, skincare products with a pH that is too acidic or too alkaline can disrupt the skin's natural barrier, leading to irritation or other issues. By recognizing the pH level of various substances, professionals can better tailor their treatments and product choices, promoting healthier outcomes for clients.

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The temperature of a solution

The density of a liquid

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