Certified Cheese Professional Practice Exam

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What does the pH scale measure in a substance?

  1. The temperature of the substance

  2. The concentration of hydrogen ions

  3. The viscosity of the substance

  4. The density of the liquid

The correct answer is: The concentration of hydrogen ions

The pH scale specifically measures the concentration of hydrogen ions (H+) in a solution. It indicates how acidic or basic a substance is, with lower pH values representing higher acidity (more hydrogen ions) and higher pH values indicating higher basicity (fewer hydrogen ions). This measurement is crucial in various scientific fields, including food chemistry, as the pH can significantly affect the taste, texture, and safety of food products, including cheese. Understanding pH is particularly important when considering cheese production, aging, and flavor development, all of which are influenced by the acidity of the milk and the cheese itself.

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