Ok, so the last experiment that we did really focused in on the reasons
that a reaction will proceed at a certain rate. The way that you will
need to think about this process has to do with particle collisions and
how they influence how fast the reaction will happen. For a reaction to
happen we need what is called an effective collision. This means
that the particles have collided in such a way that there will be a
chemical reaction. The changes we made in the lab, influence the number
of effective collisions that were occuring.
The first thing that we did in the lab was try to make a plan so that
you could determine how the lab would be done so that you could tell how
changing each variable would influence what happened. Describe quickly
what you did in the experiment. Include in this description why it was
important that you controlled the variables in a certain manner. Why was your procedure effective at determining how each variable influence on the rate? What would happen if you changed multiple
variables at the the same time?
By changing the concentration of the vinegar, the temperature of the
vinegar, and the amount that the tablet was crushed the rate of reaction
was changed. Describe, using particle collisions why each variable
changed the rate. Also describe if the results in your experiment were
consistent with what you expected to happen. If they aren't, describe
something that could have gone wrong in the process.
Enrichment: Do some online research and find an example of a real-life
catalyst. Find out what changes in the reaction and how that has a
significant influence on the rate of reaction. If you need help getting
started catalysts are often used in industrial processes in order to
make reactions more efficient. Also, you could look at enzymes and see
specifically how they change a biological process.
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