Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
Macromolecules lab report essays
Macromolecules lab report
Scientific lab report macromolecules
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: Macromolecules lab report essays
Through the experiment, it has been confirmed that the victim's last meal was at Avanti's Restaurant. In order to distinguish the possible macromolecules that the victim had ingested before the death, the four experiments were held- lipid test, protein test, glucose test, and starch test. Firstly, the lipid test was done by checking if the droplets of victim's vomit will appear translucent on the paper tissue when it's dried. The result came out to be translucent, meaning the substance contains lipids. Secondly, the protein test was held by using the Biuret Reagent to indicate whether the substance contains proteins. The positive test result will show the color change to pink or purple. When Biuret was added into the substance, its colour …show more content…
1. Using a dropper, place few drops of the unknown substance on the tissue paper. 2. Wait for the unknown substance to be dried. 3. When it is dried, look through the spot of the drop. If it became translucent, the unknown substance contains lipids, which allows the light to go through. If the drop didn't make any changes, it does not contain any lipids. The Biuret Reagent Test 1. Using a dropper, add drops of the Biuret Reagent into a test tube. 2. Using another dropper, add the unknown substance into the same test tube that has Biuret Reagent in it. 3. If the substance changed the color to pink or purple, it indicates that the substance contains protein. The Glucose Test 1. Using a dropper, add a drop of the Benedicts Reagent into a test tube. 2. Using another dropper, add the unknown substance into the same test tube that has Benedicts Reagent already in it. 3. Place the test tube inside the beaker with a half-full of hot water. 4. If the substance changed the color to yellow, orange, or brown, it indicates that the substance contains the monosaccharide(glucose). The Iodine Test 1. Using a dropper add a drop of the iodine into a test tube. 2. Using another dropper, add the unknown substance into the same test tube that has iodine in
Each subsequent trial will use one gram more. 2.Put baking soda into reaction vessel. 3.Measure 40 mL vinegar. 4.Completely fill 1000 mL graduated cylinder with water.
5. A second test tube was then filled with water and placed in a test
We then took 1ml of the 0.1% solution from test tube 2 using the glucose pipette and added it to test tube 3, we then used the H2O pipette and added 9ml of H2O into test tube 3 creating 10ml of 0.01% solution.
Also, both their Ph level was 7 which mean that they are neutral and not acidic and reaction with iodine solution was exactly the same. Therefore, with all the experiments conducted and analyzed, icing sugar is the mystery substance. c) Q: Which properties, physical or chemical, were most useful in identifying the mystery powder? Explain your answer.
The procedure of the lab on day one was to get a ring stand and clamp, then put the substance in the test tube. Then put the test tube in the clamp and then get a Bunsen burner. After that put the Bunsen burner underneath the test tube to heat it. The procedure of the lab for day two was almost exactly the same, except the substances that were used were different. The
For the first biuret test, approximately 10 drops of water were added to the test tube. After the water was inside of the test tube, 10 drops of 5M NaOH and 5 drops of the Biuret reagent solution was added. The test tube was then gently rolled by a member of the group to mix the solution and everyone recorded the color of the solution. The same procedure was followed to test for starch, protein, sugar, lipid, and the unknown, but instead of the initial 10 drops of water, a sample of the variable being tested was placed in the test tube.
Add 1 teaspoon of the contents of Beaker #4 (same solution used in previous procedure) to the Beaker #5 and stir well.
After a 2-day incubation, the Micro-ID unit was placed flat on the bench and opened; 0.1 ml of 20% KOH was added to the inoculation well of the VP test only. The tray was then closed and held upright until the KOH flowed into the VP test solution.
1. First I took five test tubes and filled each one with 5ml of black, blue, green, red and ‘clear’ colouring (for the ‘clear’ colouring I simply used water.)
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
== § Test tubes X 11 § 0.10 molar dm -3 Copper (II) Sulphate solution § distilled water § egg albumen from 3 eggs. § Syringe X 12 § colorimeter § tripod § 100ml beaker § Bunsen burner § test tube holder § safety glasses § gloves § test tube pen § test tube method = == = =
About 25ml of distilled water was added. Then 2-3 drops of phenolphthalein indicator solution were put in. It was swirl to dissolved the solid.
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
The purple liquid indicator will change colour according to the varying pH levels of different acidic and basic/alkaline solutions.
tube. Add 6 mL of 0.1M HCl to the first test tube, then 0.1M KMnO4 and