1. What two factors did you investigate in your procedure, andwhy did you choose to compare these two factors?For this procedure, I investigated how different temperaturesof water would affect the alka-seltzer’s rate of dissolution into the water. Ichose to compare boiling hot water and ice cold water in order to be able tosee how the two extremes would affect my experiment.2.
What other factors did you need to control during yourinvestigation? Explain how youcontrolled each one in your procedure.In order to maintain a level of accuracy, I controlled thevolume of the water (16oz) that I would pour into each glass, as well as rateof time. In order to accomplish this, I required a graduated cylinder and astop watch.
3. What was your prediction about the results of each factortested in your two lab procedures? Explain your predictions based on your knowledge of the dissolvingprocess, collision theory, and reaction rates.I predicted that the alka-seltzer would dissolve faster inthe boiling water than that of in the ice cold water. I believed this becauseof my prior knowledge of how, when water is heated, the molecules of H2O gainenergy, and thusly move faster. As these molecules move at a more speedy rate,they come into contact with the alka-seltzer more often, consequently resultingin the tablets dissolving into the water faster. The slower the molecules ofwater are moving, or the colder the water is, the tablets will dissolve slower.4.
In your own words, explain the collision theory, and what isnecessary for a collision to be successful.The collision theory expresses that all together forgas-stage responses to happen, particles must collide into each other. In thismanner, for a fruitful collision to happen, there must be sufficient activationenergy in the response, which could also be lowered by a catalyst.5. A specific catalyst was not provided for this reaction, butcatalysts are useful for increasing the rate of many slow reactions. In your own words, give a detailedexplanation of how catalysts can increase the rate of a reaction or process.Catalysts bring down the activation energy expected to begina response. On the off chance that a response is going on gradually, it is inall likelihood because of there being little activation energy.
By including acatalyst, it causes or quickens a chemical reaction without itself beinginfluenced and with less energy.