Thursday, March 17, 2011

Sodium Silicate Investigation

In this lab experiment we tested the conservation of mass. We did this using Pop Rocks (the candy), a full bottle of soda, two balloons, vinegar and baking soda. My hypothesis was proven to be correct. I had predicted that both of the experience would expand the balloon with air to point of which it was full. But not to the point of which it would not be able to hold it and break. The combination of Pop Rocks and carbonated liquid resulted carbon being releases and expanding the balloon. This reaction occurred because Pop Rocks are carbonated candy. When they melt the 600 PSI bubbles of gas are released. We did have to speed the process along by shaking the soda bottle. This probably increased the speed of the reaction because more carbon from the soda was released. The vinegar and baking soda turned out to be reactants in a chemical reaction. What happened was the acetic acid combined with the sodium bicarbonate created carbonic acid. It's categorized as a double replacement action. This test made the balloon expand even more than the Pop Rocks did. The first attempt was a fail because the balloon was releasing air. If we had stretchier balloons I feel the experiment would have gone better. Also, the balloons were incapable of holding the entire packet of Pop Rocks! Another variable that differed between groups is the type of soda each team used.

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