Iodine Tests For Starch And Benedict 's Test For Sugar

Gum chewing has been around for at least 3,000 years, all around the world. Gum chewing was around during the ancient greeks, the mayans, and was introduced to americans in the late 1860’s. The first bubble gum was sold in 1928 and was pink because that was the only color in the factory; pink is still one of the most popular colors of chewing gum today. In this experiment, I will be finding the percentage of sugar in the Bubbilisious Strawberry gum. To find this I will need to record the data of 625 chews, recording the mass every 25 chews.

Pick up each test tube, tap the bottom/ swirl the contents and then using your ruler record in Table 1 the bubble height (if any) that is produced. Remember to include this table (with a strong title) in your lab report.

Stopclock This is important for measuring the time. It is not important whether a digital or traditional stopclock is used as there will be the same percentage error either way. Method * Measure out 1 cm³ amylase solution with calibrated syringe and put in corvette *

Procedure: First you will need to get all the lab equipment and material that is needed to do this experiment. After that fill the 150ml beaker to ¼ full of water. Than you will be provided by a teacher or an instructor who will give copper with an scoopula. Than pour the copper that was provided into the beaker, before you stir

Fill a test tube about 1/3 full with cold tap water for use in step 34.

1.) Measure out 20ml out of the water and place it into a glass beaker

Stop the trial and restart, selecting the option to record data at 10-minute intervals. Slowly insert nutrients and allow the water pump to disperse them and dissolve them. Once the nutrient is completely added in and dissolved, turn off the pump by unplugging it. Also record the time in the trial that the pump was turned

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

1 ml of water should be added to the first test tube and make a note. In the second test tube, 1 ml of methyl alcohol should be added. In the third test tube, 1 ml of hexane must be added. Lastly, the fourth test tube will be a control.

1. A representative sample was chosen by quartering (according to BS 812: Part 102: 1984) or by use of a sample splitter (Fig. 2C1-3). The sample to be tested should be the approximate weight desired when dry. For this experiment, about 3 kilograms of coarse aggregate was weighed.

Empty and clean the test tubes and repeat steps 2-10 again for a second dataset.

1. Number four clean test tubes 1-4. 2. Place 1 ml (or 20 drops) of the following solutions into each tube: water, egg albumin, starch, and chicken broth. 3. Add 3 drops of Buiret reagent to each tube and gently shake

Collect to 2 large beakers both large beakers are to be filled with hot water (labtutor). Then obtain seven conical tubes these will be used to collect the levels of gas, you will also need test tube a stopper and a plastic tube (labtutor). You want to fill the conical tube to at least 50 ml of water (Cressy). Take the four conical tubes filled with water and place two in each beaker, to do this you must invert the tube and cover the release hole as to not lose any water (Cressy). Then place the beakers with the tubes in the bath so they can be at the same temperature as the bath (Cressy). Next mark all of your test tubes in number order to be sure which tube contains what concentrations and pH (Cressy). Having mixed a solution to the specifications of 2.5 ml of glucose in all tubes, 3 ml of yeast in 2 tubes of pH 5, 2 tubes of pH 9, and the single pH 7 tube, the remaining two tubes will contain no yeast as they will be negative controls. Next add 2 ml of pH buffer 3 tubes will receive pH of 5, three will receive a pH of 9 and a single tube of pH 7. Finally add pure water to make sure all test tubes have 10 ml of solution. When making the solutions

(6.2)Material and Methods in the process or exercise of measuring the starch we were used the following material and how we used them to conduct the experiment. Obtain seven tubes the material to be tested table 6.1 and then add seven to ten drops of iodine to each tube, and then record the color of the tubes contents in table 6.1

8.After 5 minutes, remove test tubes from the water bath set in test tube holder and record results. Also turn off hot plate.