Lab 2 Macromolecules

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Northern Virginia Community College *

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101

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Chemistry

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Oct 30, 2023

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docx

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2

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Lab 2 Macromolecules Data Tables T.C. Gillevet Name ______Name __________________________________ (Type your name on this line.) Date ___2/8/2023 ___ After you have completed all three experiments, save this document as one pdf file . You will be asked to upload this pdf file in Lab 2 Exercise . Thank you. Solution Benedict’s reagent Final Color Sugar present -, +, ++, +++, ++++ 2.0 ml Water 2.0 ml Blue - 2.0 ml Grape juice 2.0 ml Red ++++ 2.0 ml Egg white 2.0 ml Blue - 2.0 ml Milk 2.0 ml Orange +++ 2.0 ml Potato extract 2.0 ml Blue - 2.0 ml Unknown 2.0 ml Red ++++ Table 2.2 Benedict’s test for simple sugars. Write your hypothesis for Experiment 1. (See directions in Procedure.) I hypothesize that when exposed to Benedict’s reagent, grape juice will turn red. Write your conclusion for Experiment 1. The data shows that when exposed to Benedict’s reagent, grape juice does turn red. This data supports the hypothesis, so we accept the hypothesis. 1
Lab 2 Macromolecules Data Tables T.C. Gillevet Solution Iodine Final Color Starch present 0.5 ml Water 0.5 ml Amber No 0.5 ml Grape juice 0.5 ml Amber No 0.5 ml Egg white 0.5 ml Amber No 0.5 ml Milk 0.5 ml Amber No 0.5 ml Potato extract 0.5 ml Dark Blue Yes 0.5 ml Unknown 0.5 ml Dark Blue Yes Table 2.3 Iodine test for starch. Write your hypothesis for Experiment 2. (See directions in Procedure.) I hypothesize that when exposed to iodine, the 1% starch solution will turn dark blue. Write your conclusion for Experiment 2. The data shows that when exposed to iodine, the 1% starch solution does turn dark blue. This data supports the hypothesis, so we accept the hypothesis. Solution Biuret Reagent Final Color Protein present 0.5 ml Water 0.5 ml Blue No 0.5 ml Grape juice 0.5 ml Blue No 0.5 ml Egg white 0.5 ml Purple Yes 0.5 ml Milk 0.5 ml Purple Yes 0.5 ml Potato extract 0.5 ml Blue No 0.5 ml Unknown 0.5 ml Blue No Table 2.4 Biuret test for protein. Write your hypothesis for Experiment 3. (See directions in Procedure.) I hypothesize that when exposed to Biuret reagent, the egg white solution will turn lavender. Write your conclusion for Experiment 3. The data shows that when exposed to Biuret reagent, the egg white solution does turn lavender. This data supports the hypothesis, so we accept the hypothesis. 2
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