Week 15

 


This week in lab we tested an experiment and acted as if we were presenting the same lab to a class of fifth graders. The experiment we conducted was using baking soda and vinegar to prove the conservation of matter theory is valid. We ran into issues that there was weight being lost. When we weighed everything seperately and then combined the weights and then combined the substances and added a balloon to the top of the bottle. The weight that totalled up was drastically different than the post reaction weight. We adjusted our experiment and put the bottle with viengar on the scale and added a ballon filled with baking soda to the top of the bottle. Once we got the weight from this, we dropped the baking soda into the bottle. Our assumption was that this weight would be the same but it still lost weight. Our final adjustment was adding baking soda into a test tube, dropping it into the bottle without it touchign the vinegar in the bottle, putting the cap on the bottle, and checking the weight. We then shook up the bottle so the baking soda and vinegar would react with one another and placed it back on the scale: the weight never changed. This was due to removing the buoyancy factor from the balloon. Buoyancy is the ability or tendency to float in water or air. For example, fi you take a ball that si flat and push it to the bottom of a pool, it will stay at the bottom. If you take a ball that is completely flated and push it to the bottom of the pool, it wil remain at the bottom. 

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