Archives for April 2009

Experiment with Vitamin C

When you mix ascorbic acid (Vitamin C) and iodine, something cool happens: the solution turns blue for a second or two, then returns to the color of the juice. If you keep adding the iodine, the mixture will turn a very inky dark blue color. Why is this? Here’s a kid friendly explanation.

Iodine and vitamin C like each other, and when they are put in the same container, they will combine. When you are adding the iodine to the juice and the starch mixture, as long as there is still vitamin C that has not been combined with the iodine, the color will stay the color of the juice, but after you reach the equivalence point- when you have added as much iodine as there is vitamin C – then the iodine starts combining with the cornstarch. When iodine combines with cornstarch it turns blue.

And if you’re doing our award winning experiment Vitamin “C”itrus, here’s a hint: the more iodine it takes, the more vitamin C there is.

Chemistry Science Projects

Chemistry Science Projects. As students head out of elementary to middle and high school, they are expected to do more advanced science projects – like an experiment involving chemical change. We have a couple of chemical change science projects that our boys have done. These are slightly more advanced, yet still have easy to find supplies and are relatively easy to do.

Our most popular project involving chemicals is Vitamin “C”itrus. This experiment determines which fruit has the most vitamin C. A simple indicator is made, and students (and parents) enjoy watching the chemical reaction that occurs along with titration, which is a fancy way of saying “putting in drops”. This project can be modified in several different ways, allowing your student’s creativity to shine. We get letters from many students telling us that Vitamin “C”itrus was submitted to the fair, and was winning science project.

Another great science project involving a chemical change is our project The Yeast Beast. This project is so much fun to watch that our kids did it over and over until we ran out of yeast. Students watch what happens when yeast ‘eats’ sugar. This project is marketed as a demonstration project, but we also offer instructions to do it as an experiment.

Of course, for more great ideas, head to 24 Hour Science Projects. We have all sorts of ideas for your scientist, starting at the most elementary, and working up to the more advanced chemical change science projects.