During a water bath the solution progresses in the colors of blue with no glucose present green yellow orange red and then. 5H 2 O sodium citrate Na 3 C 6 H 5 O 7 and sodium carbonate Na 2 CO 3 in distilled water 4. Benedicts Test For Reducing Sugars Diagram Teaching Chemistry School Study Tips Biology Lessons Which food samples contain. . Benedicts Test is used to test for simple carbohydrates. It is a bright blue solution prepared by mixing copper sulfate pentahydrate CuSO 4. In the test tube with 2 ml of Benedicts reagent add 5-6 drops of the test carbohydrate solution and mix well. Which food samples contain reducing sugars. Common reducing agents include metals potassium calcium barium sodium and magnesium and also compounds that contain the H ion those being NaH LiH LiAlH 4 and CaH 2. Some sugars such as glucose are called reducing sugars because they are capable of. All monosaccharides are reducing ...