Rate and Collison Theory

Topics: Chemical reaction, Temperature, Activation energy Pages: 2 (313 words) Published: December 4, 2013
5.05 – Rate and Collision Theory

-Alka-Seltzer tablets
-2 Small glass cups
-Phone (to use as a timer)
-2 big class cups

1. Using the glass, fill it with water that is 25 degrees Celsius, use the thermometer to make sure the temperature is correct. 2. Have my phone ready to time how long it takes for the tablet of alka-seltzer to dissolve in the water. 3. Then, getting another cup, we have room temperature water. Then, we drop another alka-seltzer tablet into the water and time how long it takes to dissolve. 4. Repeating steps one and two with more water than in the smaller glass cups and seeing how long it takes for the tablets to dissolve.


1. The two factors I compared were the temperature of the water and the Alka-Seltzer. I chose these factors because I was able to see the difference in liquid temperature in dissolving the tablets. 2. I controlled the amount of water because that would help determine the quickness of the dissolving, also, I controlled the temperature because that would determine if the tablet was fast or slow to dissolve. 3. With the temperature, I predicted the cold water would slow the tablet down from dissolving. In contrast, the hot water would dissolve quicker. Whereas the larger amount of water would make the tablet dissolve slower and the smaller amount of water would make the tablet dissolve quicker. 4. The collision theory is basically stating that in reactions, atoms or molecules are opposing forces that are coming together and the reaction is the aftermath of the collision. 5. Catalysts are the ultimate starting point of the reaction. It’s like the red light turning green! The green light is the catalyst to everyone proceeding in traffic. Catalysts are the lower versions of activation energies. The collisions can be a lot more successful and quicker, with lower activation energy, which is the catalyst.
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