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Chem 116 - General Chemistry II

Determining the Specific Rate Constant - Video Solution

Consider the theoretical reaction:  3 X  + Y + 2 Z ➞ Products.  Initial rate data is shown below. 

[X]

[Y]

[Z]

-d[X]/dt (M/s)
(or initial rate of consumption of reactant X)

0.0092 M

0.11 M

2.0 M

1.6×10–2

0.0092 M

0.11 M

1.0 M

1.6×10–2

0.0138 M

0.055 M

2.0 M

1.8×10–2

0.023 M

0.11 M

2.0 M

10.×10–2

What is the rate law for this reaction?  Rate = k[X]2[Y]1
What is the value of the specific rate constant for this reaction? k = 1.7 x 103 M-2s-1

Video B11