a student is performing a benedict's test on an unknown substance. the student adds the reagent, and nothing happens. which conclusion can the student make?

Answer 1

If a student performs a Benedict's test on an unknown substance and observes no color change, they can conclude that the substance does not contain reducing sugars, such as glucose or fructose. Benedict's test is used to detect the presence of reducing sugars, which will reduce the copper(II) ions in the reagent, typically resulting in a color change from blue to green, yellow, orange, or red, depending on the amount of reducing sugar present. However, the lack of any reaction suggests that either no reducing sugars are present or the concentration is too low to produce a detectable change.