Sept 23, 2008

Sept. 23, 2008
In class today we learned about acids and did an acid testing lab. We found that when you slowly squirt 5ml of vinegar into a cup with 1ml of baking soda, a reaction happens which causes bubbles. When the same experiment is tried in a bottle that has an air tight stopper, we saw the syringe raise up due to carbon dioxide gas rising. It was really interesting to see the syringe move all the way out becuase of the reaction that was caused by the vinegar and baking soda. I learned today in class that baking soda is an indicator of the presence of acid. That is why vinegar reacted and let off carbon dioxide gas. Because baking soda is an indicator we used it to mix with different fruit juices to see how acidic they were. We found that lime was the most acidic of lemon, orange, and grapefruit juice. All four juices bubbled a bit, but lime was by far the juice that reacted most.