[Zheezy]

Hey this is my first post, might post more regarding my experiment. I'm doing an experiment right that involves using redox titration to find the Vitamin C on various vegetables. I'm following an article that's helped me a lot but it says for the Iodine solution that I need to "Dissolve 5.00 g potassium iodide (KI) and 0.268 g potassium iodate (KIO3) in 200 ml of distilled water". I was wondering if the iodine solution would work just as well without the potassium iodate? I don't really have that with me right now and I don't know how to make it. It seemed like a small enough amount where I probably could just the potassium iodade. Thanks

[chenbeier]

No, check what happen if you mix the two solutions. What does later the vitamin C.

[mjc123]

Here http://www.chemteach.ac.nz/investigations/vitamin_C_iodine.shtml is an example of a version without the iodate. They say:

"This method is more straight forward than the alternative method using potassium iodate, but as the potassium iodate solution is more stable than the iodine as a primary standard, the alternative method is more reliable."