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CONCEPT: 1ST, 2ND or 0TH: WHAT'S YOUR ORDER? If you were super observant you might have noticed that although we were ta
CONCEPT: 1ST, 2ND or 0TH: WHAT’S YOUR ORDER? If you were super observant you might have noticed that although we were talking about rate, the rate law didn’t include ___________ as a variable.

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The good thing is that the _______________ Rate Laws help to answer an important question in kinetics: •

“How long will it take x moles per liters of A to be consumed?”

 

Rate Laws Zero-Order

[A]t = −kt +[A]0

Rate Equations

First-Order

Second-Order

ln[A]t = −kt + ln[A]0

                   

1 1 = kt + [A]t [A]0

 

    ln[A]0

Slope = - k

1/[A]

Slope = - k

ln[A]

[A]

[A]0

Slope = k

1/[A]0 Time

Time

 

Time

         

   

Half-Life

t1 = 2

[A]0 2k

t1 = 2

   

ln 2 k

t1 = 2

1 k[A] 0