Elements and Chemical Reactions at Hollenbeck Middle

We are diving into the chemical properties of our soil at Hollenbeck. Since our science classes have been studying elements and chemical reactions, this week we hosted a little science expirament to test the pH in our own soil. First, we studied the formula for combining baking soda and vinegar (an acid and a base) and discussed what we thought the reaction would look like in real life. Then we tested the formula ourselves and the reaction occured so fast that all the CO2 given off pratically made our water bottle explode! 

Afterward, we used purple cabbage to test acidity levels. Purple cabbage contains anthocyanin, a chemical that is sensitive to pH levels. We dissolved the anthocyanin into water and then were able to tell the acidity based on color.  By adding soil to the water, we could even test pH levels in our soil!

-ranger eleanor