2 Prepare your testing samples as follows a Mix one egg white with 25 mL water

2 prepare your testing samples as follows a mix one

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2. Prepare your testing samples as follows: a. Mix one egg white with 25 mL water in a 250 mL beaker to create an albumin solution. Pipette 5 mL of this solution into Test Tube 1. b. Mix the packet of Knox® gelatin with 50 mL hot water in a second 250 mL beaker. Stir until dissolved. Pipette 5 mL of this solution into Test Tube 2. 3. Pipette 5 mL of the 1% glucose solution into Test Tube 3. 4. Use the 10 mL graduated cylinder to measure and pour 5 mL of water into Test Tube 4. 5. Pipette 5 mL of the “Unknown Solution” into Test Tube 5. 6. Record the initial color of each sample in Table 1. 7. Develop a hypothesis regarding what you predict will happen when Biuret solution is added to Tubes 1 - 4. Record your hypothesis in the Post-Lab Question section. Then, pipette five drops of Biuret solution to each test tube (1 - 5). Swirl each tube to mix. 8. Record the final color in Table 1. Note : Protein is present in the sample if a light purple color is observed. ©eScience Labs, 2016
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Table 1: Testing for Proteins Results Sample Initial Color Final Color Protein Present 1 - Albumin Solution White Purple yes 2 - Gelatin Solution Yellow Purple Yes 3 - Glucose Clear Blue tint No 4 - Water Clear Blue tint No 5 - Unknown gray Cloudy blue No Post-Lab Questions 1. Record your hypothesis about what will happen when Biuret solution is mixed with the solutions from test tubes 1, 2, 3, and 4 here. Be sure to use scientific reasoning
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