Virginia Commercial Pesticide Applicators CORE Exam

How can you differentiate a solution from a suspension?

1. A solution is opaque, while a suspension is clear

2. A solution can be filtered, while a suspension cannot

3. A solution is clear and homogeneous, while a suspension is opaque

4. A solution is always colored, while a suspension is not

The correct answer is: A solution is clear and homogeneous, while a suspension is opaque

The correct answer highlights the distinct characteristics of a solution and a suspension. A solution is a homogeneous mixture where the solute is fully dissolved in the solvent, resulting in a clear liquid that exhibits uniform composition throughout. Because the particles of the solute are on a molecular or ionic level, they do not scatter light, which is why the solution appears clear. In contrast, a suspension contains larger particles that are not fully dissolved in the solvent. These particles can scatter light and often cause the mixture to appear opaque or cloudy. Over time, suspensions may settle when left undisturbed, as the solid particles are not chemically combined with the liquid. None of the other options accurately capture the fundamental differences between solutions and suspensions. For example, while filtering can separate larger particles in a suspension, a solution generally cannot be filtered effectively because its solute particles are too small. Similarly, neither a solution nor a suspension is defined solely by color, as both can be colorless or exhibit color depending on their components.