20 - AP Chemistry Lab Oxidation-Reduction Titrations...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
AP Chemistry Lab Brockport High School NY USA Oxidation-Reduction Titrations: Determination of Oxalate Mr Keefer Introduction Oxalate compounds have importance in many chemical and biological reactions. They are used in the photographic sciences, and are the main component of kidney stones. Excess vitamin C is converted into oxalate and excreted in the gut and urine, therefore, kidney stone patients must limit their intake of vitamin C to control the formation of calcium oxalate stones, as well as foods high in oxalate, such as spinach, beets, and beans. Potassium permanganate reacts with oxalate ions to produce carbon dioxide and water in an acidic solution, and the permanganate ion is reduced to manganese (II) as follows: 5C 2 O 4 2- (aq) + 2MnO 4 - (aq) + 16H + (aq) 10CO 2(g) + 8H 2 0 (l) + 2Mn 2+ (aq) No indicators are necessary in permanganate titrations because the end point is easily observed. The permanganate ion is intensely purple, whereas the manganese (II) ion is nearly colorless. The first slight
Image of page 1
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