Tennessee Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

The term that describes the measure of how much a substance can dissolve in water is solubility. Solubility is a crucial concept in chemistry, which refers specifically to the ability of a solute to dissolve in a solvent, resulting in a homogeneous solution. This property varies among different substances and is influenced by factors such as temperature and pressure.

Understanding solubility is particularly important in cosmetology, as many products involve solutions where active ingredients must dissolve effectively in water to ensure proper application and efficacy. For instance, knowing the solubility of certain ingredients helps in formulating skincare or hair products to achieve the desired results.

Other terms related to the question involve different concepts. Viscosity pertains to a fluid's resistance to flow, persistence refers to how long a substance remains in the environment without breaking down, and concentration concerns the amount of a substance in a given volume of solution. Each of these plays a role in various applications but does not directly define the ability of a substance to dissolve in water.