Karen is working with an unknown organic substance. She mixes a sample of the substance with Benedict's solution and heats it. The mixture changes from blue to a orange/red color. Based on the test results, Karen can conclude that the unknown substance is a
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It is a reducing sugar.
Benedict's reagent is a chemical reagent named after American chemist Stanley Rossiter Benedict. It is a complex mixture of sodium carbonate, sodium citrate and copper(II) sulphate pentahydrate. It is often used in place of Fehling's solution to detect the presence of reducing sugars.
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Based on the test results, the organic substance that Karen is testing is glucose.
When glucose is heated with Benedict's solution, it forms an orange-red or brick red precipitate that is indicative of the presence of aldehyde group.
Since glucose gives a positive test, it can be used to test glucose presence in urine, and confirm the a patient has diabetes.
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