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 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 substance is glucose based. The substance is glucose based. The test was inconclusive because the student forgot to add heat. The test was inconclusive because the student forgot to add heat. The substance is not glucose based. The substance is not glucose based. Skip to navigation

Answer 1

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

In a Benedict's test, a color change indicates the presence of reducing sugars, such as glucose. If the reagent is added and there is no color change, it suggests that the unknown substance does not contain reducing sugars like glucose.

Answer 2

that was wrong

Answer 3

I apologize for any confusion. Let's reassess the situation with the details provided.

In a Benedict’s test, if there is no color change after adding the reagent and heating, the possible conclusions could be:

1. The substance is not glucose-based: This is a valid conclusion if we assume that glucose or other reducing sugars should elicit a color change.
2. The test was inconclusive because the student forgot to add heat: Benedict's test requires heating to facilitate a reaction, so if heat was omitted, this could be the reason for no color change.
3. The test was inconclusive because the student needed to also test with iodine or vinegar: Although iodine is used to test for starch, vinegar (acid) does not specifically indicate the presence of reducing sugars. So this option isn't particularly helpful in concluding about the unknown substance.

Given your feedback and the context of the test, the most suitable conclusion could indeed be:

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

Please let me know if you have any additional questions or would like further clarification on this topic!

Answer 4

that would have been helpful before i answered the question

Answer 5

I apologize for not providing the correct insight earlier and for any frustration that may have caused. Thank you for your understanding, and if you have any more questions or need further clarification on any topic, please feel free to ask!