What physical property relates to how well a substance can be mixed with water?

• A. Viscosity
• B. Solubility
• C. Density
• D. Specific gravity

Answer: (B)

The physical property that relates to how well a substance can be mixed with water is solubility. Solubility refers to the ability of a substance, known as the solute, to dissolve in a solvent, which in this case is water. When a substance is soluble, it means that it can interact at the molecular or ionic level with water molecules, leading to the formation of a homogeneous mixture.

Understanding solubility is crucial in hazardous material management because it affects how contaminants may spread in the environment and how they can be treated or cleaned up. For instance, substances that are highly soluble in water can move quickly through water systems, leading to potential exposure or contamination of larger areas.

While viscosity, density, and specific gravity are important physical properties, they do not directly measure the ability to mix with water. Viscosity refers to a fluid's resistance to flow, density is the mass per unit volume of a substance, and specific gravity is a ratio that compares the density of a substance to that of water. However, none of these properties indicate how well a substance can dissolve in water like solubility does.