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Second eyes for a final draft please- A small baggie of glucose solution is plac

ID: 1050045 • Letter: S

Question

Second eyes for a final draft please-

A small baggie of glucose solution is placed in a small beaker of distilled water. We pulled a sample of water (colorless) from the bottom of the beaker and add Benedict solution (light blue) to it which turned it to a light blue color. Adding Benedict solution to glucose tests for presence of reducing sugars that have the aldehyde functional group – CHO (or, free ketone group I.e. alpha-hydroxy ketone, too). When the Benedict solution was added, the glucose solution immediately takes the color of Benedict's reagent and turns it to light blue. When the mixture was heated in boiling distilled water, aldehyde group gets oxidized by accepting an O-atom from OH- and gives up and electron that copper ion (Cu2+) accepts and then become reduced which turns Benedict's solution and sugar into an orange color indicating a positive result due to the color change proving diffusion occurred. Test was not redone. Our group and the group we compared our results with had same results and color.  

Explanation / Answer

Draft looks ok to me. I have added a few things .

A small baggie of glucose solution is placed in a small beaker of distilled water. We pulled a sample of water (colorless) from the bottom of the beaker and add Benedict solution (light blue) to it which turned it to a light blue color.Adding Benedict solution to glucose tests for presence of reducing sugars that have the aldehyde functional group – CHO (or, free ketone group I.e. alpha-hydroxy ketone, too) however other reducing substances also give a positive reaction. When the Benedict solution was added, the glucose solution immediately takes the color of Benedict's reagent and turns it to light blue. When the mixture was heated in boiling distilled water, aldehyde group gets oxidized byaccepting an O-atom from OH- and gives up and gives up electron that Cu^2+ ion accepts and reduced to Cu2O. Due to this oxidation -reduction reaction Cu2O precipitates and Benedict's reagent tuns orange in color.orange color indicating a positive result due to the color change proving diffusion occurred. Test was not redone. Our group and the group we compared our results with had same results and color.

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