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Do The Solutions We Are Experimenting Test Positive For Protein, Starch?

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Homework 4: Experiment Analysis
1. Do the solutions we are experimenting test positive for protein, starch, or sugar?
2. Chemical indicators are used to detect certain molecules. These are often used to test for supplements to recommend to consumers. Using Benedict’s, Biuret’s, and Lugol’s Reagent will test for protein, starch, and sugar to observe what has the best nutrition value for consumption.
3. I predict that solution #3 will change the most color after being tested by Benedict’s Lugol’s, and Biuret’s reagent because it has the most protein, sugar, starch in the nutrition facts. To test for a positive reaction, we observe if the solution changes into a specific color depending on which regent is being used. For Biuret’s Reagent, a positive …show more content…

Each sample of solution #3 being tested by the three reagents will have the most noticeable change in color in result of a positive reaction between solution #3 and the reagent.
5. We took three samples of three solutions, a positive control, and a negative control (fifteen test tubes total.) Each sample was tested by Benedict’s, Biuret’s, and Lugol’s Reagent for a reaction. The result of the reaction was then recorded in notes. The positive control was the color that changes after the protein, and the negative control was the sample without treatment. The dependent variable is the color change. The independent variable is the chemical reaction with the reagent. The treatment group is Supplement #1, 3, and 9.
6. Sample one had a positive reaction with Biuret’s reagent and Lugol’s reagent; however, no precipitate formed with Benedict’s reagent. Sample three did not have a positive reaction with Biuret’s reagent because it had a gray color change. There was a positive reaction between sample three and Lugol’s reagent and Benedict’s reagent. Sample nine had a positive reaction with all three reagents.
7. Our hypothesis was rejected because sample nine had the most observable color change, not sample three like we

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