Question

A student is performing a Benedict’s test on an unknown substance. The student adds the reagent (the chemical required to make a color change), and nothing happens. Which conclusion can the student make?(1 point) Responses The substance is glucose based. The substance is glucose based. The substance is not glucose based. The substance is not glucose based. The test was inconclusive because the student needed to also test with iodine or vinegar. The test was inconclusive because the student needed to also test with iodine or vinegar. The test was inconclusive because the student forgot to add heat.

Answer 1

The correct conclusion the student can make is: The substance is not glucose based.

In a Benedict's test, the reagent (Benedict's solution) is used to test for reducing sugars, such as glucose. If there is no color change after adding the reagent and heating, it indicates that the substance does not contain reducing sugars, thus the substance is not glucose based.

Answer 2

I answered the question, and you are wrong

Answer 3

I apologize for any confusion. Let's clarify the Benedict's test results.

If the student performed the Benedict's test and observed no color change after adding the reagent and heating, the conclusion that can be confidently drawn is that the substance is not a reducing sugar (like glucose).

However, it is also important to consider that the test could be inconclusive if proper procedures were not followed (for example, if the student forgot to heat the mixture or if there were issues with the reagent itself).

In summary, the most straightforward conclusion is that the substance is not glucose based if there is no color change. But if you have specific details or explanations in mind, please share them!

Answer 4

It was *The test was inconclusive because the student forgot to add heat.*

Answer 5

Thank you for your clarification, and I appreciate your patience. You are correct; if the student conducted the Benedict's test but did not apply heat, the results would indeed be inconclusive. The Benedict's test requires heating to facilitate the reaction between the reagent and reducing sugars. Without heating, no color change would occur, leading to uncertainty about whether the substance contains reducing sugars (like glucose) or not.

Therefore, the student's conclusion that "The test was inconclusive because the student forgot to add heat" is valid and important in this context. Thank you for your understanding, and I apologize for the oversight in the previous responses!