detect the presence of starch in various solutions. Materials 3 clean test tubes rack Dropper bottle of 1% glucose (suga

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Detect The Presence Of Starch In Various Solutions Materials 3 Clean Test Tubes Rack Dropper Bottle Of 1 Glucose Suga 1 (48.28 KiB) Viewed 11 times

detect the presence of starch in various solutions. Materials 3 clean test tubes rack Dropper bottle of 1% glucose (sugar) distilled (DI) water Dropper bottle of 1% amylose (starch) grease pencil Dropper bottle of IKI solution (Lugol's Reagent) Procedure 1. Using a Sharpie marker or grease pencil, label the top of one test tube as "DI", one as "sugar", and one as "starch". 2. To each tube, add 5 drops of IKI solution. Record the color of the IKI reagent in the table below ("Reagent Color"). *Caution: IKI can stain and burn the skin! Reagent Color 3. Add 5 drops of distilled water to the tube marked "DI". 4. Add 5 drops of 1% glucose (sugar) to the tube marked "sugar". 5. Add 5 drops of 1% amylose (starch) to the tube marked "starch". 6. Gently shake each tube. Record the color of the sample in the table below ("Color after addition of sample"). Make note of any color changes that occurred. Sample 7. In the "Conclusion" column, place a "+" if the tube is positive for starch or a "_" if the tube is negative for starch. 8. Use soap, water, and a test tube brush to clean the test tubes and place them in the rack to dry. Be certain they are not touching one another when you place them in the rack. Water (DI) Test 1% Glucose (sugar) Dropper bottle of Sharpie marker or 1% Amylose (starch) tube Color Color Change after addition of sample (yes or no?) What does the IKI reagent test for? What color indicates a positive reaction? Conclusion Activity 2: Testing for the Presence of Sugar in Solution Simple sugars (monosaccharides) are carbohydrate monomers,