Tuesday, March 15, 2011

Chemical Reactions and Temperature Lab Investigation

In this experiment, we tested chemical reactions in different temperatures. We tested what change in the chemical reaction would happen if we changed the temperature of the water. At first, we tested the water at room temperature. The water started out at a temperature of 74.8 degrees F. We put the tablet of alka seltzer in and the bubbles started to form. The chemical reaction was that the tablet created bubbles that fizzed up to the surface of the water. The reaction lasted about 36 seconds. During that time, the degrees of the water decreased about 0.7 degrees. The next test that we conducted was water that had been cooled with ice cubes. We had stirred the water for about a minute to make the water equally cool. Once we stirred the water, we did that same as the last experiment. We tested the chemical reaction again with the alka seltzer tablet. This time, the reaction was different because the water was colder. The alka seltzer tablet was dissolving a lot slower than the first tablet. The reaction time was 1:06. I think that the coldness of the water slower down the reaction. The water was 58.5 degrees F before and after the water was 58.6. The last experiment was conducted with hot water that was heated up to 52 degrees C, which is 125.6 degrees F. This time, the tablet dissolved a lot quicker than the room temperature and the cold water. The tablet dissolved in 21 seconds. I think since the water was heated up, it caused the water to speed the reaction.

No comments:

Post a Comment