Iodine Test Lab Report

During the lab experiment six different test were conducted. Each test consists of chemicals to be tested using 3 to 10 drops of the additive in order to observe a change. With any experiment you compose a hypothesis; where you make an educated guess. The hypothesis will primarily be, which base chemical will produce the greatest change based on the additive. Experiment 6.1 (Starch) when adding the three drops of Iodine to each tube observe the color change. When performing this test the chemical with the larger amount of iodine will be identified. The larger the amount of iodine in the chemical will result in a purple/black color. The iodine/starch complex has energy level spacings that are just for absorbing visible light-giving the complex its intense purple/black color. The method to be used, consist of three drops of iodine in the chemical filled tube that is to be tested. The starch solution is expected to give that dark purple/black color, simply for the fact it contains starch. Experiment 6.1(2) (Iodine Test) What color does the chemical turn when you add one to three drops of iodine to each tube? The purpose of this test is to determine which chemical is positive for iodine. The effect of the purple/black color is only seen when both iodine as an element, and iodine as an ion are present. Several different food products will be tested with an additive of one to three drops of iodine. The chemical that is expected to have the positive
In order to determine which solution has protein in it. The chemical that test positive for Biuret will have a violet color. The color caused by the reaction of peptide bonds in the protons or peptides. The presences of free amino acids will not give you the violet color. With the seven test tubes of Different chemicals, add ten drops of (koh). The egg albumen is expected to have to violet