AP Chemistry 3.1 Chemical Reaction Rates
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AP Chemistry 3.1 Chemical Reaction Rates. A graph of which of the following data will give a straight line graph for a first order reaction?
|AP Chemistry||Chemical Reaction Rates|
|Test Prep||AP Chemistry|
And here are your potential answers: All right, so we know that for a first order
reaction, the rate is proportional to the concentration of the reactant. [First order reaction equation]
That means that as the reaction proceeds, the concentration of the reactant decreases
more and more slowly.
To be a little more specific, the concentration of [A] decays exponentially.
Just like your concentration in the math class you have right before lunch. [Students in math class]
If your eyes are in proper working order, you can tell by looking at the graph that
this is not a straight line. [Graph with a sloping line]
If it looks like one to you, we highly recommend a quick visit to the optometrist. [Girl conducting an eye-exam]
Anyway, since this is a graph of the concentration of A versus time, we can eliminate A).
Options C) and D) could be right if the reaction orders were different.
But, unfortunately, teachers don’t give credit for potential correctness. [Answers C and D crossed out]
So that means that a graph of B would give you a straight line for a first order reaction.
For first-order reactions, the graph of the natural log of the concentration of the reactant
versus time will be a straight line.
So B will take you straight to the finish line. [B crossing the finish line on a running track]
We’d tell you another chemistry pick up line, but all the good ones argon. [Periodic table and Argon asks to call me]