8 chem 11

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University of Kentucky *

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111

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Chemistry

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Dec 6, 2023

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3

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Che 111 4/09/2023 Experiment 8: Solving a Murder Mystery Using Transition Metals and DNA Introduction The purpose of this experiment was to find the answer to a murder mystery using oxidation-reduction reactions. The first step was to collect DNA then use the oxidation- reaction methods to find the killer. The chemical that was used to oxidize the DNA was potassium permanganate (KMnO 4 ). There are four chemical formulas that DNA consists of adenine (C 5 H 5 N 5 ), cytosine (C 4 H 5 N 3 O), guanine (C 5 H 5 N 5 O), and thymine (C 5 H 6 N 2 O 2 ). Together these four chemical formulas combine and create DNA. In this experiment Arnolds DNA will be represented with adenine, Cindy's DNA will be represented with cytosine, Gary's DNA will be represented with guanine, and Tina’s DNA will be represented with thymine. Methods There were no changes to the published procedures. The procedures to this lab are found in the lab manual Experiment 8 “Solving a Murder Mystery Using Transition Metals and DNA” on page 110. Discussion The purpose of this experiment was to find the answer to a murder mystery using
oxidation-reduction reactions. The results of this experiment found that Gary committed the murder. The reaction turned the same color as the reaction from the DNA found on the knife. The results of the experiment do align with the purpose. The results align with the purpose of this experiment because the killer was found using oxidation-reduction methods. A potential error that could have been made would be that too much KMnO 4 was added to the DNA. A second source of error could be that the test tubes were not properly cleaned and thus something could have been contaminated. A third source of error could be that not enough DNA was added to the test tubes causing an improper reaction. Conclusion The purpose of this experiment was to find the answer to a murder mystery using oxidation-reduction reactions. The results from this experiment found that Gary was the killer using oxidation-reduction methods. Using test tubes potassium permanganate was used to find the oxidation state of the DNA in order to find out who was the killer. Works cited
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