Lab Report Info

Category: Chemistry
Last Updated: 27 Jan 2021
Pages: 2 Views: 284

Lab Report Procedure 6. 1: Perform Benedict’s test for reducing sugars. Introduction: Benedict’s tests allows for the detection of the presence of reducing sugars. All monosaccharides are reducing sugars since all of them have active carbonyl group. Some disaccharides that are exposed to a carbonyl group are also reducing sugars but less reactive than monosaccharides. By mixing the sugar solution with Benedict’s solution and heating them, a redox reaction will occur.

The copper (II) sulphate present in Benedict’s solution reacts with electrons from aldehyde or ketose group of reducing sugars to form cuprous oxide, a red brown precipitate. Materials: The materials used in order to detect starches was: test tubes, distilled water, Benedict’s solution, starch were used. Negative Control: H20 Positive Control: Starch Obtain nine test tubes and number them 1-9 Add to each tube the materials to be tested. Add 2ml of Benedict’s solution to each tube.

Place all the tubes in boiling water- bath for 3 minutes and observe color changes during this time. After 3 minutes , remove the tubes from the water- bath and give the tubes ample time to cool to room temperature. Record the color of their contents. Procedure 6. 2: Perform the iodine test for starch Tube Solution Benedict’s Color Reaction Iodine Color Reaction 1 10 drops onion juice No change Blue->Black w/white No change 2 10 drops potato juice Precipitation Yellow-> blue 3 10 drops sucrose solution

Order custom essay Lab Report Info with free plagiarism report

feat icon 450+ experts on 30 subjects feat icon Starting from 3 hours delivery
Get Essay Help

No change No change 5 10 drops distilled water No change No change 6 10 drops reducing sugar solution Blue No change 7 10 drops starch solution No change Yellow-> Blue 8 Unknown Blue-> Red Brown 9 Unknown 2 Blue Brown 4 10 drops glucose solution Blue-> Brown No change Tube Solution Color 1 2 ml egg albumen Green/yellow 2 2 ml honey No change 3 2ml amino acid solution Purple 4 2ml distilled water No change 5 2ml protein solution Purple 6 Unknown Colorless 7 Unknown 2 Colorless

Cite this Page

Lab Report Info. (2017, May 06). Retrieved from

Don't let plagiarism ruin your grade

Run a free check or have your essay done for you

plagiarism ruin image

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Save time and let our verified experts help you.

Hire writer