Chemistry science projects involving a chemical change are often chosen by middle and high school students. Many kids like to do an experiment with a dramatic chemical change. When searching for a project, it can be difficult to find an experiment with chemicals that are easy to find, and easy to work with.
One beloved scheme inviting chemicals is an experiment determining which fruit or fruit juice has the most vitamin C. A uncomplicated indicator is made with cornstarch and iodine. Students (and parents) enjoy watching the chemical reaction that occurs along with titration, which is a fancy way of saying "putting in drops". This scheme can be modified in some different ways, allowing your student's creativity to shine. We get letters from many students telling us that this easy science scheme was submitted to the fair, and was chosen as a winner.
Another great science scheme inviting a chemical change is watching what happens as yeast 'eats' sugar. In this project, warm water and yeast are located in a bottle with a bit of sugar. A balloon is located over the mouth of the bottle. As the yeast consumes the sugar, carbon dioxide is released, causing the balloon to blow up. This scheme is so much fun to watch that our kids did it over and over until we ran out of yeast.
Both of these projects can be done as demonstrations; they offer dramatic reactions that students will be able to witness immediately. Both science projects can also be experiments. They naturally lend themselves to a question, the formation of an hypothesis, and testing. The results can certainly be graphed to form a conclusion.
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