Using Iodine as an Indicator

Posted by sciencemom
January 7, 2009

In our “Vitamin C-itrus” project, students are shown how to make a Vitamin C indicator using corn starch and water. The instructions call for 2% or 10% iodine. Sometimes parents try to find the iodine at a science supply store. This isn’t necessary; regular antiseptic iodine will work, as long as it is not the decolorized type.

Using iodine as an indicator is an easy but fascinating way to show the presence of vitamin C.

If you’re interested in doing this project, visit “24 Hour Science Projects“.

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[...] Vitamin C in Orange juice change over time? This is a slightly more advanced version of our popular Vitamin ‘C’itrus’ [...]

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