AP Chemistry LabBrockport High School NY USAOxidation-Reduction Titrations: Determination of OxalateMr KeeferIntroductionOxalate 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:5C2O42-(aq)+ 2MnO4-(aq) + 16H+(aq)10CO2(g) + 8H20(l)+ 2Mn2+(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
This is the end of the preview.
access the rest of the document.
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.
Temple University Fox School of Business ‘17, Course Hero Intern
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.
University of Pennsylvania ‘17, Course Hero Intern
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.