Using Iodine as an Indicator
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 [...]
Vitamin C – Using an Indicator
When you mix Iodine and Vitamin C (the scienctific name is ascorbic acid), something interesting happens; the solution turns blue for a bit, then returns to the color of the juice. Keep adding the iodine, however, and the mixture will turn a very inky dark blue color. Why is this? Here’s a kid friendly explanation?
Iodine [...]