Use a new glucose strip and record Data: Conclusion: According to my data, pH levels do, in fact, affect the results of Lactex. I say this because in my experiment, pre-enzyme, my solutions were all negative except for the soda. I used the test strips to determine if they were negative or positive solutions. After I put in the enzyme, Lactex, my results changed. Vinegar, Antacid, and Soap all became positive solutions after I put in the enzyme.
Solutions have been made from samples of each container, and labelled A, B, C, and D. Use chemical tests to identify each solution. Be very careful not to cross contaminate the solutions! You should describe what you did at each stage in order to identify the compounds. Describe how you would test a sample of food to check for the presence of lipids, such as oils or fats. P5 First I collected four test tubes; in each test tube I purred the solution that has been labelled A, B, C, and D in the container.
Some of the black precipitate becomes stuck to the side of the beaker as it’s being stirred and some of the liquid being vaporized. By decanting the solution, much of what is left in the beaker remains black precipitate; however, some clear liquid can also be seen. A slight loss of black precipitate was also observed from decanting. The precipitate completely dissolves with the addition of roughly 25 drops of HCL and there is a change of color to yellow-green. As the drops are being added, a distinct yellow color can be observed where the drops were landing in the solution.
When you smell caraway oil, you will get a moist wood type smell. When you smell the spearmint oil, you should smell a really strong minty smell. Not only is it really minty, but it has a slight smell of alcohol. In the second part of this lab, you will be using an analytical gas chromatography. The analytical gas chromatography will tell you the retention times of the components in your substance.
That is a very good question Mr. Brown. I will start at the beginning and explain what cholesterol is so that you can have a clear understanding. Then we will review the results of your recent blood tests and I can clarify why it is important to monitor your cholesterol levels. Lastly, we will discuss a plan of care that will provide you with options on how best to manage your cholesterol levels including any lifestyle changes that can assist you in achieving optimal health. Cholesterol is a waxy substance that is made in your body or can enter your body through the food that you eat.
Experiment 4: Using Buffers Name: Andrew Duval Lab Partners: None Location: My House Course Number: Chem 112 Date: July 28, 2013 Abstract: This lab aims to teach us about the use of buffers, or in this case vinegar. Buffers are used to control the pH of a solution, because they are able to able to absorb strong acid or bases. Because of this fact, we can add acid or basic mixtures and control the outcome of the pH by also mixing a buffer in there as well. In this lab we will be adding 0.1M and 6M HCL and NaOH to a two mixtures. One mixture will contain vinegar, and the other will contain distilled water.
After this write down the color of the bag and the beaker solutions and then test the bag and beaker solutions for the presence of glucose. Picture: Diffusion Lab Setup Picture 1.1 Data: Diffusion Lab Data | Initial Contents | Solution Color | Presence of Glucose
So you would be able to measure how far it travels after you are done with the experiment. Conclusions In this lab we were able to find what colors go into different foods that we eat or drink like M&ms and Kool-aid. Also we were able to find the Rf values of each of the colors. This lab was simple yet had to pay a lot of attention to make sure that the colors wont bleed together or that the solvent doesn’t go above 2 cm of the cylinder when put into the dish. Also it is very important to mark with a pencil instead of a pen because the pen will bleed and mess up the
The paper was then put into a beaker of a hydrochloric acid, ethanol, and butanol mixture, being sure that the paper does not touch the sides of the beaker, and then topped. After the eluting solution has risen to within two centimeters of the top of the filter paper, the paper was removed from the beaker, dried, and was stained with a staining reagent solution containing potassium ferrocyanide and potassium iodide. This reagent forms colored precipitates or reaction products with many cations, including all of those used in this experiment. The distance of which the spots moved were determined by calculating the Rf value of each substance. The Rf value is determined by following formula: Rf=DL=distance component movesdistance solvent moves This experiment was successful overall, given a few errors.
The different kinds of Aspirin tablets are: * Enteric Coated Tablets * Capsules * Regular Tablets * Dissolving Tablets. Each tablet will be dissolves in both Water and Hydrochloric Acid (representing saliva and stomach acid respectively). Hypothesis The Enteric Coated tablet will remain undissolved in both water and Hydrochloric Acid as the coating is designed to remain undissolved until reaching the small intestine. The dissolving tablet will dissolve the fastest in both water and Hydrochloric Acid as this tablet is designed to quickly dissolve in liquid. The capsule will soften but not completely dissolve in the water, however will dissolve in the Hydrochloric Acid.