Redox Arena Post-lab pdf - Sadaf Ayaz Professor Edmund Tam...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Sadaf Ayaz Professor Edmund Tam Lab Partners: Natalia and Gabby 02/25/2016 Redox Arena Post-lab Observations Abstract: The abstract of part one was to create homemade substances to compare with standard materials from the lab to test for Zinc or Iodine in part two. Focus Questions(Part 1): 1. What happens Qualitatively on both the Macroscopic and atomic Levels when Zinc, Iodine, and Acidified Water are mixed? Does a reaction occur? Chemicals Amount Granular Zinc 2.1 grams Iodine crystals 2.0 grams 0.17M Acetic Acid Solution 5mL Chemicals Physical properties Magnesium turnings Metal looking, silver, thin small curled pieces 0.17M Acetic acid Clear colorless liquid, water-like Silver Nitrate Clear colorless liquid Mineral Oil Thick liquid, clear and colorless Zinc Ion Yellow liquid Granular Zinc Steel color, small particles, crystal-like 3M HCl acid Clear colorless liquid Solid zinc iodide Looks like light brown sugar, sand-like, powdered, light brown Iodine crystals Sparkly, shimmery, gray/silver crystal, different size small pieces Solution of sodium thiosulfate Clear water like liquid ( to clean iodine stains) desiccant Solid, white, raisin sized pieces, looks chalky and wrinkly Boiling chips Small solid pieces, white color, looks like coconut flakes.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
When Zinc, Iodine, and Acidified water mix together, they produce a reaction. The solution changes color and releases heat, exhibiting an exothermic reaction. At first, the mixture was a dark re- brownish color, almost black. However after more mixing, the liquid slowly changed color and became completely clear. After using heat, we were able to evaporate the water, leaving the white solid behind. Therefore, Zinc and Iodine reacted to create Zinc Iodide. 2. If a reaction does take place, are the physical and chemical properties of the substances, isolated during and after the mixing, the same as or different from those of the iodine and zinc? Explain using your reaction as an example. We created 3 substances in the reaction: the white product, gray solid, and colored solution. We inferred that the white solid has different physical properties from Iodine and Zinc after seeing that the solid is white rather than gray or blue. The colored solution had different physical properties because it was a liquid and had a different orangish brownish color. The gray solid wasn’t much different physically from the zinc granules because the color was the same, dark shades of gray, and it was still had small solid pieces. Chemically, however, all three substances are different from the initial Iodine and Zinc because the colored solution, is mixed with the acidic water where the zinc loses electrons and the Iodine gains them, and the white substance was a product of heat and a complete reaction of the colored solution, and the gray solid is the zinc granules that were left behind, which we could tell due to the tests we applied at the end. Due to the chemical reactions and
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern