A concentration gradient exists in a solution when the concentration of solutes in the solution is
A. less than the amount of solvent.
B. not the same everywhere.
C. greater than the amount of solvent.
D. the same everywhere.
Answer (2)
A concentration gradient means the concentration of solutes changes over a distance.
If the concentration is the same everywhere, there is no gradient.
Therefore, a concentration gradient exists when the concentration is not the same everywhere.
The correct answer is that the concentration is not the same everywhere. O
Explanation
Understanding Concentration Gradient A concentration gradient refers to the gradual change in the concentration of a solute in a solution over a distance. In simpler terms, it means that the amount of solute is different in different parts of the solution.
Analyzing the Options If the concentration of solutes is the same everywhere, there is no change in concentration over distance, and thus no concentration gradient exists.
Conclusion Therefore, a concentration gradient exists when the concentration of solutes is not the same everywhere.
Examples
Imagine you're baking a cake and you add food coloring to the batter. Initially, the color is concentrated in one spot. As you stir, the color spreads out, creating a visual concentration gradient where the color intensity changes gradually until it's evenly distributed. This concept is crucial in many real-world scenarios, such as understanding how nutrients are absorbed in your body or how pollutants spread in the environment.
A concentration gradient exists when the concentration of solutes is not uniform throughout the solution, meaning it varies from one area to another. Therefore, the correct answer is that the concentration is not the same everywhere (Option B).
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