Qualitative Analysis Lab Report.pdf

Qualitative Analysis Lab Report.pdf - Qualitative Analysis...

This preview shows page 1 - 3 out of 5 pages.

Qualitative Analysis of the Group I Cations October 23, 2017 CHEM 1412-W01 Fall 2017 Dr. Rodriguez By: Alejandra Nunez-McDermott
Image of page 1
Abstract: The overall purpose of the lab was to analyze a sample of Group I cations for the presence of silver, mercury, and lead(II) ions. In part A, the precipitate formed with the chlorides of silver, mercury, and lead which was done by a process of centrifuging the sample multiple times. For part B, the purpose was to determine if the sample had a presence of lead ions which was done by adding acetic acid and potassium chromate solution and centrifuging. The purpose of part C was to determine if there was mercury and silver ions in the sample which was done by adding ammonia, nitric acid, potassium iodide, and centrifuging. Through the experiment, it was determined the unknown sample had lead, mercury, and silver ions present. Experimental: Part A To perform this part of the experiment, 1 mL of both the sample known and unknown solution were put into a test tube and then 10 drops of 6 M hydrochloric acid (HCl) was added. The mixtures were then individually stirred and then centrifuged--placed across from each other, for 8 minutes. Once out of the centrifuge, 1 drop of HCl was added to each test tube to make sure that no more precipitate was formed. Since none formed, the centrifugate for both test tubes was discarded in the waste bin. Then, the precipitate left was washed by adding 1 mL of distilled water and 2 drops of 6 M HCl and then centrifuged. Once done, the centrifugate was discarded and this process was repeated again to ensure the best possible precipitate. From this part of the experiment the chlorides of silver, mercury and lead were separated from other species. Part B In this part of the experiment, the same two precipitates from the previous part was used and 2 mL of distilled water was added to each. This mixture was then put into a boiling water bath for 4 minutes while being frequently stirred with a glass rod.
Image of page 2

Want to read all 5 pages?

Image of page 3

Want to read all 5 pages?

You've reached the end of your free preview.

Want to read all 5 pages?

  • Spring '13
  • badillo
  • Chemistry, Ion, test tubes, Sulfuric acid

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