(c) If the student mixed 10 mL of distilled water with 10 mL of the sample, would this diluted solution have anabsorbance greater than, less than or equal to the absorbance of the original solution? Justify your answer.

The diluted solution have an absorbance less than the original solution

Explanation:

As you can see in the graph, the absorbance of a substance is directly proportional to the concentration of the substance (Lambert-Beer law). That means a solution more concentrated than another will have an absorbannce greater than the more diluted solution.

In the problem, you are diluting the original sample by the addition of 10mL of distilled water, that means,

c) should be the answer.